if the secretion of oxytocin during childbirth operated as a negative-feedback control loop, what effect would it have on uterine contractions?
Answers
If the secretion of oxytocin during childbirth operated as a negative-feedback control loop, it would have an inhibitory effect on uterine contractions.
In a negative-feedback control loop, the output of a system opposes or reverses the initial stimulus, aiming to maintain homeostasis. In the context of childbirth, oxytocin is released in response to uterine contractions and acts to stimulate further contractions. However, if oxytocin secretion operated as a negative-feedback control loop, it would result in an inhibitory effect on uterine contractions.
Under normal circumstances, oxytocin secretion during childbirth is a positive-feedback loop. The initial contractions stimulate the release of oxytocin, which leads to more intense contractions, and the cycle continues until delivery occurs. This positive-feedback loop allows for the progression of labor.
If oxytocin secretion were to function as a negative-feedback loop, the release of oxytocin in response to contractions would decrease or cease once contractions reach a certain level or intensity. This would result in a dampening or inhibition of uterine contractions, potentially interfering with the progress of labor and hindering the delivery process.
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Related Questions
When does the exponential growth of a population stop?
Answers
Answer:
When the population reaches its carrying capacity.
Explanation:
As a population grows, there is more competition for resources which can limit a population. There are also natural disasters that can play a role too such as disease. Another factor that is part of carrying capacity is the size of the habitat. If there is no room, then the population cannot increase.
Answer: When the organisms compete
Explanation:
ap3x
4. If eutrophication is severe, the water body may no
longer be able to support life. This is because the water
becomes depleted of____
due to the overactive_____________
that are decomposing the surplus of
decaying organisms, which died due to the__________.
The bacteria use the oxygen for__________.
.
Answers
Answer: becomes depleted of____
due to the overactive_____________
that are decomposing the surplus of
decaying organisms, which died due to the__________.
The bacteria use the oxygen for__________.
.
Explanation: Eutrophication sets off a chain reaction in the ecosystem, starting with an overabundance of algae and plants. The excess algae and plant matter eventually decompose, producing large amounts of carbon dioxide. This lowers the pH of seawater, a process known as ocean acidification.
Crocuses can bloom in the winter, while dahlias bloom in the fall. This is due to different responses to daylight length or _________.
A. Sun rays
B. Photoperiodism
C. phototropism
D. geotropism
Answers
Answer:
It's becoz of sun rays.....
A prokaryotic cell may possess each of the following cellular components except
Answers
The absence of a proper nucleus and membrane-bound organelles distinguishes prokaryotic cells from other types of cells. Endoplasmic reticulum, Golgi bodies, mitochondria, plastids, or membrane-bound vesicles are not present in prokaryotic cells.
It is possible for microorganisms to be bacteria, fungus, archaea, or protists. Virens and prions, which are typically categorized as non-living entities, are not considered to be microbes. Similar in size to prokaryotic cells are mitochondria and chloroplasts. Circular DNA is unique to both mitochondria and prokaryotic cells. A 70S type of ribosome can be found in chloroplasts, mitochondria, and bacteria.Prokaryotic cells lack the large number of membrane-enclosed organelles (such as mitochondria, lysosomes, and the Golgi apparatus) seen in eukaryotic cells, which also have a nucleus that is attached to a membrane.
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Wastes and now the remains largely of dead organic matter would accumulate, and the nutrients in the waste and dead organisms would not be released back into the environment. The producers would not have had enough nutrients.
Answers
Organic matter, organic material, or natural organic matter refers to the large source of carbon-based compounds found within natural and engineered, terrestrial, and aquatic environments.
What is Organic matter?It is matter composed of organic compounds that have come from the feces and remains of organisms such as plants and animals. Organic molecules can also be made by chemical reactions that do not involve life.
Basic structures are created from cellulose, tannin, cutin, and lignin, along with other various proteins, lipids, and carbohydrates. Organic matter is very important in the movement of nutrients in the environment and plays a role in water retention on the surface of the planet.
Organic chemicals make up all living things. When organisms are alive, they emit or excrete organic material into the environment, lose body parts like leaves and roots, and their corpses are decomposed by bacterial and fungi after they die.
Therefore, Organic matter, organic material, or natural organic matter refers to the large source of carbon-based compounds found within natural and engineered, terrestrial, and aquatic environments.
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Relating Cause and Effect Look at the
diagram of a lava plateau below. Why doesn't
the type of eruption that produces a lava
plateau produce a volcanic mountain instead?
Answers
Due to the fact that thin, runny lava travels a great distance before cooling and solidifying repeatedly over the course of millions of years, this sort of eruption results in high, level areas rather than cone-shaped ones.
What is lava?
Lava is molten or partially molten rock (magma) that has been ejected onto a planet's surface from its interior, such as a moon. On land or under water, lava may erupt from a volcano or from a crack in the crust, typically at temperatures between 800 and 1,200 °C. Lava is another name for the volcanic rock that results from subsequent cooling.
Lava flows are the discharges of lava that occur during effusive eruptions. Most lava has a viscosity similar to ketchup, or 10,000–100,000 times that of water. Lava exposed to air quickly forms a solid crust that insulates the remaining liquid lava, allowing it to continue flowing for a long distance before cooling forces it to solidify.
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(iv) Cretinism and Myxedema are due to: A. Hyper secretion of thyroxine B. Hyper secretion of growth hormone C. Hypo secretion of thyroxine D. Hypo secretion of growth hormone
Answers
Cretinism and Myxedema are due to Hypo secretion of thyroxine Option C
What is a hormone?A hormone is a chemical messenger produced by endocrine glands in the body that helps regulate physiological processes, including growth and development, metabolism, and mood. Hormones travel through the bloodstream to target cells and organs, where they bind to specific receptors and elicit a biological response.
We know that the thyroid gland is the gland that is in the body that ahs the job of being able to secrete the hormone that is called the thyroxine in the body.
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Which type of selection is the most likely to result in Speciation?A. Disruptive selectionB. Stabilizing selectionC. Artificial selectionD. Directional selection
Answers
As you can see in the images, there are 3 types of natural selection:
- Disruptive: In which the phenotypes at the extremes prevail instead of the phenotype in the middle which is the average.
- Stabilization: In which the middle phenotype prevails.
- Directional: One of the extreme phenotypes prevails.
Speciation is a process in which new species are formed from an initial species and can occur due to various conditions and therefore, there are several types. An example is the image (allopatric speciation) in which a geographic barrier divides the individuals of the population and over time, these give rise to different species.
Since disruptive selection is the only one that favors the presence of more than one phenotype, it is more likely to produce a speciation phenomenon in which 2 or more distinct species are obtained over time. Therefore, the answer is A.
True or false when thermal energy is added the tempature will increase execpt during a phase change is occuring?
Answers
Answer:
true. when the thermal energy of an object increase the temperature increases
How many bacteria will there be after four hours f single bacterium that divides to produce two cells every 15 minutes?
Answers
Answer:
65536 bacteria cells
Explanation:
According to this question, a single bacterium divides to produce two cells in every 15 minutes. Since there are 60 minutes in 1 hour, this means that the bacterium will have divided (60 ÷ 15) = 4times in an hour
Based on this question, in 4 hours, the bacterium will have divided 4 hours × 4 times = 16 times.
The breakdown is; 4hours × 60mins = 240 mins
240 mins ÷ 15 mins interval
= 16 times.
The number of cells that this single bacterium will produce can be calculated using the simple formula; 2^n
Where; n is the number of times the cell can divide in 4 hours
Therefore, since the cell can divide 16times in 4 hours,
= 2^16
= 65536
There will be 65536 bacteria cells produced after 4 hours of division into two new cells in every 15mins.
The idea that action or behavior is entirely influenced by external forces rather than internal will is called __________. Determinism reciprocity modeling self-efficacy.
Answers
Answer:
A
Explanation:
got it right on edge
Lactose, or milk sugar, is composed of one glucose unit and one galactose unit. It can be classified as a.
Answers
Lactose can be classified as a disaccharide.
What are Disaccharides?When two monosaccharides are connected by a glycosidic bond, a disaccharide is created. Disaccharides are simple sugars that are soluble in water, just like monosaccharides. Maltose, lactose, and sucrose are three typical examples.One of the four chemical divisions of carbohydrates is the disaccharide group. Disaccharides having 12 carbon atoms, such as sucrose, lactose, and maltose, have the general formula C12H22O11. These disaccharides differ according to atomic configurations inside the molecule. Monosaccharides are joined into double sugars through a condensation reaction, which only requires the removal of a water molecule from the functional groups.A type of enzyme known as a disaccharidase facilitates the hydrolysis of a double sugar into its two monosaccharides.To learn more about Disaccharides with the given link
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What is a isotonic solution? How does it affect a red blood cell?
What is a hypertonic solution? How does it affect a red blood cell?
What is a hypotonic solution? How does it affect a red blood cell?
Answer plz!
Answers
Answer: If you place an animal or a plant cell in a hypertonic solution, the cell shrinks
Explanation: because it loses water ( water moves from a higher concentration inside the cell to a lower concentration outside ). ... A single animal cell ( like a red blood cell) placed in a hypotonic solution will fill up with water and then burst.
An isotonic solution is one wherein the solute concentration across the semipermeable membrane is the same resulting in an equilibrium state.
They do not shrink or swell in an isotonic saline solution, i.e., 0.9% w/v solution of sodium chloride
Hypertonic solution: A solution that contains more dissolved particles (such as salt and other electrolytes) than is found in normal cells and blood.
Now, let’s suppose RBCs are placed in a solution with a sodium chloride concentration of 2% w/v. The sodium chloride concentration of 2% w/v is greater than the RBC’s sodium content and hence the solution is hypertonic. This will result in shrinkage of the RBCs known as crenation
When a solution has a lower solute concentration than the solution present across the semipermeable membrane, it is known as a hypotonic solution. As a result, when a cell is placed in a hypotonic solution, an osmotic pressure gradient forces the solvent to move into the cell in order to attain equal solute
In another situation, let’s suppose RBCs are placed in a solution with a sodium chloride concentration of 0.1 % w/v. The sodium chloride concentration of 0.1% w/v is less than the RBC’s sodium content and hence hypotonic saline. This will result in swelling and eventually bursting of the RBCs which will result in the release of hemoglobin. This is known as hemolysis which is a very dangerous situation.
Before you perform an experiment, which variable should you already know? A. A distant variable B. A manipulated variable C. A responding variable D. An experimental variable
Answers
Answer:
B.
Explanation:
⚠️HELP⚠️
UV rays, chemicals, radiation, and tobacco products are all agents known to cause cancer because they can cause the DNA in cells to be incorrectly transcribed, therefore continuously making a
protein. What are these agents caffed?
Pollution
A
B
Mutagens
С
Polypeptides
D
Anticodons
Answers
While the average human is able to hold his or her breath for approximately one minute, a whale can dive for over 30 minutes without returning to the surface. Which of the following correctly describes this difference? (4 points)
Whales need less energy than humans.
Whales gather energy from their environment better than humans.
Whales are more efficient at gas exchange than humans which helps them conserve energy.
Whales have cells that produce energy differently than humans.
Answers
Answer:. I guess it's b because we know that whales have a blowhole hope this helps
When forest land is cleared for human use, the loss of trees can lead to other changes to Earth's surface. Which of the
following processes is most likely to occur after land has been cleared of its trees?
Answers
Answer:
Global warming
Increase in sea level
Depletion of ozone layer
spread of disease
when a person sits up, increasing the vertical position of their brain by 37 cm, the heart must continue to pump blood to the brain at the same rate.
Answers
When a person sits up, increasing the vertical position of their brain by 37 cm, the heart must continue to pump blood to the brain at the same rate because gravity exerts a downward force on blood in the vessels in the body.
Blood flow to the brain is essential to keep it functioning.Blood flow to the brain is essential for its proper functioning. Blood flow through the circulatory system is aided by the heart, which pumps blood through the vessels.The pumping of the heart helps to maintain the circulation of blood throughout the body, including the brain. When a person sits up, the force of gravity changes, and this has an impact on the way blood is pumped through the body's vessels.If the vertical position of the brain increases by 37 cm, the heart must continue to pump blood to the brain at the same rate, regardless of changes in the position of the body. This is because the brain needs a constant supply of blood to get oxygen and nutrients and to remove waste products from its cells.Therefore, the heart is responsible for maintaining blood pressure, which is necessary for blood flow to the brain and other organs, and it must adjust to accommodate changes in the position of the body.
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7) When oxygen is available to a cell, the complete breakdown of glucose and the release of energy is called?
a) photosynthesis
d) synthesis
b) aerobic respiration
e) glycolysis
c) lactic acid fermentation
Answers
Answer:
B) Aerobic Respiration
Explanation:
why are the offspring of asexually reproducing organisms genetically identical to their parent?
Answers
Answer: Because thear is only one parent.
What is the metabolic center of an individual neuron?.
Answers
What type of scientist would be the best qualified to perform genetic engineering to pro- duce seed that are more productive in agriculture? A. biochemist B. geologist C. molecular biologist D. paleontologist
Answers
The type of scientist best qualified to perform genetic engineering to produce more productive seeds in agriculture would be a molecular biologist, the correct option is C.
Molecular biologists specialize in studying the structure, function, and interactions of molecules within biological systems, including DNA and genes. Genetic engineering involves manipulating the genetic material of organisms, which requires a deep understanding of molecular biology principles.
Molecular biologists have the expertise to identify and isolate specific genes responsible for desired traits in crop plants, such as increased productivity or resistance to pests or diseases. They can then modify or introduce these genes into target plants to achieve the desired outcomes, the correct option is C.
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in which region of the world mudflows are more common
Answers
Answer:
Usually in mountainous areas.
Endangered Species
Research an endangered species. Include an image of this species. Discuss the following questions: Approximately how many are left? When is the estimated time they will be extinct? What is the major cause of their future demise?
Vulnerable Species Research a vulnerable (threatened) species. Include an image of this species. How many are there left or have reappeared? What is being done to help them come back? What was the cause of their decline or demise?
Answers
a. Endangered Species: African Elephant: The African elephant is a majestic species that is facing extinction due to various factors. Approximately 415,000 African elephants remain in the wild, with their population declining by 60% over the last 75 years.
b. According to the International Union for Conservation of Nature (IUCN), the African elephant is classified as vulnerable, and it is estimated that if current trends continue, they could be extinct within the next few decades.
The major cause of their future demise is the illegal wildlife trade, particularly the demand for ivory. Poaching for ivory has led to the killing of tens of thousands of elephants each year, resulting in severe population declines in many African countries. In addition to poaching, habitat loss and fragmentation, human-wildlife conflict, and climate change also pose significant threats to African elephants.
To help African elephants, several conservation efforts are underway. These include anti-poaching measures, habitat restoration, and community-based conservation programs. In addition, many countries have banned the trade in ivory, although enforcement of these laws can be challenging.
Vulnerable Species: Snow Leopard: The snow leopard is a vulnerable species that is found in the high-altitude mountain ranges of Central and South Asia. Approximately 4,000 to 6,500 snow leopards remain in the wild, with their population declining by 20% over the last three decades. According to the IUCN, the snow leopard is classified as vulnerable due to habitat loss and fragmentation, poaching, and retaliatory killings by herders.
The major cause of their decline is habitat loss and fragmentation due to human activities such as mining, agriculture, and infrastructure development. In addition, poaching for their pelts and body parts is also a significant threat to snow leopards. Retaliatory killings by herders who lose their livestock to snow leopards are also a major cause of their decline.
To help snow leopards, several conservation efforts are underway. These include habitat restoration, anti-poaching measures, and community-based conservation programs. In addition, the Snow Leopard Trust and other organizations are working to educate local communities about the importance of snow leopards and to promote sustainable development practices that minimize negative impacts on snow leopard habitat.
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8. Valley breezes and mountain breezes result from differences in heating. (10
points)
A. Draw a picture of both a valley breeze and a mountain breeze. (4 points)
B. Label the direction of airflow for all parts of the cycle. (4 points)
C. Label the time of day each breeze takes place. (2 points)
Answers
In order for one to draw the pictures of both a valley breeze and a mountain breeze, these information are important to note and know:
1. A valley breeze occurs during the day when the sun heats the mountain slopes, causing the air to rise and creating a low-pressure area. Thus, your diagram should depict a mountain in the day with the movement of the air.
2. A mountain breeze occurs at night when the mountain slopes cool faster than the valleys. This causes the air above the mountains to become cooler and denser, creating a high-pressure area. Thus, your diagram should depict a mountain in the night with the movement of the air.
What is a breeze?A breeze is a light, gentle wind that is typically pleasant and refreshing. Breezes are usually characterized by their relatively low speed, which is typically less than 10 miles per hour.
Breezes can be caused by a variety of factors, including differences in temperature and pressure, the rotation of the Earth, and the presence of nearby bodies of water.
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Plant and animal cells are both eukaryotic. Using the model, identify the similarities between the two cells.
Question 3 options:
Both have a plasma membrane, ribosomes, mitochondria, and centrioles.
Both have a plasma membrane, ribosomes, mitochondria, and golgi apparatus.
Both have a cell wall, ribosomes, mitochondria, and endoplasmic reticulum.
Both have a mitochondria, nucleus, endoplasmic reticulum, and chloroplasts.
Answers
Answer:
Both have a plasma membrane, ribosomes, mitochondria, and golgi apparatus.
Explanation:
Animal cells don't have a cell wall nor chloroplasts. Centrioles are exclusive to animal cells.
Plant and animal cells both are eukaryotic.
The similarities between the two cells are that both have plasma membrane, ribosomes, mitochondria and golgi apparatus.
Major differences between plant and animal cellsPlant cells contain cell wall which maintains the integrity of the cell as well as protect the plant cell.
whereas, animal cell lack cell wall.
Plant cell contain chloroplast to carry out photosynthesis and make their own food.Whereas, an animals are heterotrophic that relies on plants for the
nutrients.
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jhun ma, geybels ms, wright jl, et al. gene expression signature of gleason score is associated with prostate cancer outcomes in a radical prostatectomy cohort. oncotarget 2017;8:43035-47.
Answers
The study has provided evidence that gene expression signatures can be used to predict prostate cancer outcomes in high-risk patients. Future research in this area is required to further improve the accuracy of gene expression signatures in predicting prostate cancer outcomes.
The article “Gene expression signature of Gleason score is associated with prostate cancer outcomes in a radical prostatectomy cohort” has been published in the journal Oncotarget in the year 2017 and is authored by Jhun Ma, Geybels MS, Wright JL, et al. The study aims to evaluate whether the prognostic gene expression signature can predict prostate cancer outcomes following radical prostatectomy.
The Gleason score has been used as a predictor of prostate cancer prognosis for many years.The study included 172 men who underwent radical prostatectomy. They studied the association between Gleason score and the gene expression signature of prostate cancer and its association with prostate cancer outcomes. The study concluded that gene expression signatures can predict prostate cancer outcomes in patients with high-grade prostate cancer.
This finding could be used to help identify patients who are at high risk of recurrence and require more aggressive treatment.The study emphasizes the importance of personalized medicine and the use of gene expression signatures in predicting cancer outcomes.
The study also highlights the need for further research in this area to improve the accuracy of gene expression signatures in predicting prostate cancer outcomes. Therefore, this research can be used as a guide for future researches to develop a better understanding of the mechanisms involved in prostate cancer and its outcomes.
In conclusion, the study has provided evidence that gene expression signatures can be used to predict prostate cancer outcomes in high-risk patients. Future research in this area is required to further improve the accuracy of gene expression signatures in predicting prostate cancer outcomes.
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membrane-enclosed bodies within eukaryotic cells are called . a. micelles b. prokaryotes c. organelles d. eukaryotes
Answers
Membrane-enclosed bodies within eukaryotic cells are called organelles. The correct answer is thus C.
Eukaryota is a varied domain of creatures whose cells have a nucleus, and its members are referred to as eukaryotes. Eukaryotes include all animals, all plants, all fungi, and many unicellular creatures. Along with the two prokaryote groups, the Bacteria and the Archaea, they make up a significant group of organisms.
Possibly as a sister archaea to the Asgard archaea, the eukaryotes first appeared in the Archaea. This suggests that there are just two types of life: eukaryotes are included in the Archaea and there are only two types of life: Bacteria and Archaea.
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1. What happens to the sugars that are made during photosynthesis?
A. They move directly into the Electron Transport Chain
B. They go back into the light-independent reactions of the Calvin Cycle
C. They can be used for cellular respiration or stored as starches
D. They make ATP by bonding together
2. Energy is released from an ATP molecule for cellular processes when it...
1 point
has a phosphate group removed
has a phosphate group added
converts a phosphate group to ADP
produces sugar molecules
3. If oxygen is unavailable to the cell...
1 point
glycolysis will proceed directly into the Kreb's Cycle, then the Electron Transport Chain
glycolysis will proceed directly to the Electron Transport Chain, bypassing the Kreb's Cycle
glycolysis will proceed into either lactic acid or alcoholic fermentation
glycolysis will not be able to occur; the cell will be unable to make ATP
4. The primary light-absorbing pigment molecules found in plant leaves and used during photosynthesis are called...
1 point
Chloroplasts
Thylakoids
Chlorophyll
ATP
Answers
Answer:
Question 1 ; C | Question 4 ; Chlorophyll
Explanation:
Question 1 explanation; Photosynthesis is the process in which plants use sunlight, water, carbon dioxide, to create oxygen and energy in the form of sugars. The sugar then goes through the process of cellular respiration and is used to make energy in the form of ATP.
Question 2 explanation; Chlorophyll, is the main pigment used in photosynthesis, which reflects green light and strongly absorbs blue and red light. For plants, photosynthesis takes place in chloroplasts (a small organelle inside the cells of plants and algae) , which contain chlorophyll.
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If green fish are recessive (rr) and red fish are dimninate (RR or Rr) what is the ration of green to red fish in a population?
Answers
In a population, the ratio of green to red fish will depend on the frequency of the dominant and recessive alleles present in the gene pool of that population. If green fish are recessive (rr) and red fish are dominant (RR or Rr), the possible genotypes of the population can be RR, Rr or rr.
The dominant R allele masks the recessive r allele. Therefore, any fish with R in their genotype will display the dominant red phenotype. Only the fish with rr genotype will display the green phenotype. Thus, the ratio of green to red fish can be calculated by examining the possible genotypes present in the population.
If the frequency of the R allele in the population is p and the frequency of the r allele is q, then: p + q = 1(One gene has two alleles). The proportion of homozygous dominant individuals in the population is p2, the proportion of heterozygous individuals is 2pq, and the proportion of homozygous recessive individuals is q2.
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