Which three of the following are examples of feedback mechanisms which help maintain homeostasis?
A antibodies binding to a virus
B flagellar rotation for cell movement
Cinsulin secretion in response to high blood sugar
D Nincresed heart rate in response to exercise
E protein synthesis
F proton pumping to maintain a proper pH level
Answers
Answer:
F proton pumping to maintain a proper pH level
Related Questions
A student combined equal amounts of two solutions one solution has a pH of 2 and the other has a pH of 12 which would most likely be the resulting pH? 1,3,6,11
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Answer:
It would be 6
Explanation:
Because high hydrogen concentration plus high hydroxyl concentration forms a neutral solution.
What does a number in front of a molecular formula stand for?
Answers
Answer:
The small number behind each element symbol designates the number of atoms of each element in a chemical formula. If there is no number, it is assumed there is only one of those elements. A large number in front of a compound designates how many units there are of that compound.
vesicle containing oxidase enzymes
Answers
A vesicle containing oxidase enzymes refers to a small, membrane-bound compartment within a cell that holds and transports oxidase enzymes.
Oxidase enzymes are involved in cellular respiration and play a crucial role in generating energy for the cell through the process of oxygen consumption. The vesicle helps to compartmentalize the enzymes, ensuring that they are in the right place at the right time to perform their function effectively. The vesicle is formed from the cell membrane and can be transported within the cell or to other cells through a process known as exocytosis.
By using vesicles to transport enzymes, cells can regulate their metabolic processes and maintain the proper balance of chemical reactions.
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Complete question
Vesicle containing oxidase enzymes refers to what.
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Please help!!
Huge mountain systems, like the Himalayas, are created when____
A. continental crusts rub past each other
b. continental crusts collide and fold
C.oceanic crusts subducts under
D.continental crust
oceanic crusts pull apart
Answers
Which joint moves only by a uniaxial movement around its own axis?
Answers
The joint that moves only by a uniaxial movement around its own axis is the pivot joint.
What is a pivot joint?A pivot joint is a type of synovial joint that allows for rotational movement around a single axis.
In a pivot joint, one bone has a cylindrical projection that fits into a ring or notch in another bone, allowing rotational movement around a single axis. Pivot joints are also known as rotary joints.
In this type of joint, one bone rotates around another bone's axis, allowing only one movement, such as rotation. An example of a pivot joint in the human body is the joint between the atlas and axis vertebrae in the neck, which allows us to rotate our heads.
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How are trees agents of mechanical weathering?
Practice
A
Growing tree roots physically break apart rock.
B
Tree roots secrete a lot of acids that react with minerals in the rock.
C
Trees cause chemical reactions to take place altering the soil and rock nearby.
D
Trees do not cause rocks to weather.
Answers
Growing tree roots physically break apart rock are the tree agents of mechanical weathering. So, the correct option is (A).
What is Mechanical Weathering?Mechanical weathering is also called physical weathering in which a large rock breaks down into smaller pieces of rocks. When rocks decompose or break down without experiencing any change in their chemical composition, it is known as mechanical weathering.
There are 3 Mechanical Weathering Processes which break down rocks
Frost wedging.Exfoliation.Biological activityThe roots of a plant grow into a crack in a rock. When these roots grow, they open the crack. Burrowing animals can also cause weathering. The animal may break the rock to dig for food or make a hole to live in.
Thus, growing tree roots physically break apart rock are the tree agents of mechanical weathering. So, the correct option is (A).
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Within a plant leaf, most photosynthesis occurs in cells called ______ cells, which are often interspersed with air spaces to maximize gas exchange.
Answers
Answer:
The spongy mesophyll is the kind of cell described.
Explanation:
"Most of the interior of the leaf between the upper and lower layers of epidermis is a parenchyma(ground tissue) or chlorenchyma tissue called the mesophyll (Greek for "middle leaf"). This assimilation tissue is the primary location of photosynthesis in the plant."
The main layers of the leaf are the cuticle, which is the "skin," the palisade mesophyll (the second topmost layer of cells), the spongy mesophyll, which is lower, and the lower cuticle. The spongy mesophyll is so called because it consists of leaf cells interspersed with air, which maximises their access to oxygen.
How do guard cells maintain homeostasis?
Answers
Answer:
Explanation: Guard cells in the plants prevent water loss from it in cases of soil dryness or high temperature by closing themselves. If this does not happen, water will keep leaving the plant by the process of transpiration in these harsh conditions and the plant will not have the important medium for the homeostasis process to continue.
Does divergence cause mountains to form?
Answers
Answer:
A divergent plate boundary often forms a mountain chain known as a ridge. This feature forms as magma escapes into the space between the spreading tectonic plates.
Explanation:
when would anaerobic respiration be used instead of anaerobic respiration?
Answers
Answer:
produce 2 anaerobic respiration
Which statement describes the process of subduction?
Convection currents cause two plates to move away from each other.
A plate slides beneath another plate due to convection currents and gravity.
Materials are heated and transferred within Earth’s interior by density.
Heat cycles in the mantle cause plates to constantly move.
Answers
Answer:
A plate slides beneath another plate due to convection currents and gravity :)
Example:
At a destructive plate margin, two plates move towards each other (oceanic and continental). The oceanic plate is denser, and subducts
Answer: the first one i did the
Explanation:
If the tangent of an angle of a right angled triangle is 0.8 , then it's longest side is
Answers
The longest side of the right-angled triangle is 4.8 units.
What is the length of the longest side of the right-angled triangle?In a right-angled triangle, the tangent of an angle is defined as the ratio of the length of the side opposite the angle to the length of the side adjacent to the angle.
Let's assume the angle in question is one of the acute angles of the triangle.
To find the length of the longest side, which is the hypotenuse, we can use the trigonometric relationship in a right-angled triangle: tangent(angle) = opposite/adjacent.
Given that the tangent of the angle is 0.8, we can set up the following equation: 0.8 = opposite/adjacent.
Since the opposite side is usually referred to as the height and the adjacent side as the base, we can rewrite the equation as follows: 0.8 = height/base.
To isolate the height, we can rearrange the equation as: height = 0.8 * base.
However, since the longest side is the hypotenuse, the base will represent the adjacent side, and the height will represent the opposite side. Therefore, we have: hypotenuse = 0.8 * adjacent side.
Assuming the adjacent side has a length of 6 units, we can calculate the hypotenuse as follows: hypotenuse = 0.8 * 6 = 4.8 units.
Therefore, if the tangent of an angle in a right-angled triangle is 0.8, the length of the longest side (hypotenuse) is approximately 4.8 units.
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When you centrifuge the DNA isolated from the bacteria, the DNA separates into two classes. One class of labeled DNA includes very large molecules (thousands or even millions of nucleotides long), and the other includes short stretches of DNA (several hundred to a few thousand nucleotides in length). Which two classes of DNA do these different samples represent
Answers
Answer:
Leading strand and Okazaki fragments
Explanation:
The two classes of DNA that the different samples represent include the leading strand and the Okazaki fragments.
The large molecules DNA with thousands/millions of nucleotides constitutes the leading strand of the DNA while the short stretches of DNA with just a few thousand nucleotides in light constitute the Okazaki fragments.
This is because, during replication, the leading strands of DNAs are usually synthesized in a continuous manner and end up forming a long, continuous daughter strand while the lagging strands are usually synthesized in short, discontinuous fragments known as the Okazaki fragments.
The continuous/discontinuous replication of the leading/lagging strands of the DNA is due to the characteristics of the enzyme responsible for adding bases to the growing daughter strands. The DNA polymerase enzyme can only add nucleotides in the 5' to ' direction.
Help me please A & B
Answers
Answer:
i need the chart love
Explanation:
How are nutrients replenished in the soil?
Those who will give the answer for this question I will mark them Brainliest.
Answers
Answer: Crop-rotation , Fertilizers and manure and Growing Legumes
Explanation:
There are different ways of replenishing nutrients in the soil and they are : Crop-rotation , use of fertilizers and manure and growing Leguminous Plants. Crop rotation replenishes nutrients in the soil by keeping the soil fertile through-out the year . One season you may plant a crop that drains nutrients from the soil then the next season a crop that gives back nutrients .The use of fertilizers and manure . Fertilizers increase crop yield and manure helps to keep the land fertile and provide essential nutrients like phosphorous. Growing leguminous plants .
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In some individuals, the thyroid does not produce enough hormone, so these individuals may take a replacement hormone, such as thyroxone. The concentration C(t) of thyroxone (in micrograms) in the person's body decays exponentially with a half-life of about seven days. Consider an individual who has taken 120 mcg of thyroxone. a) (1 point) Which of the following is true for the concentration of the drug in the individual's body? After 14 days, none of the hormone remains After 14 days, 30 mcg remains O After 14 days, 119 mcg remains O After 14 days, 106 mcg remains 0.099t > b) (3 points) The thyroxone concentration (in mcg) can be modeled by C(t) 120e where t is the time in days after the individual has taken the drug. When will the concentration be 12 mcg? Round your answer to the nearest day.
Answers
The following is true for the concentration of the thyroid drug in the individual's body is after 14 days 30 mcg remains, option B and the time when the concentration be 12 mcg is t = 23.23 sec.
The thyroid, or thyroid organ, is an endocrine organ in vertebrates. In people, it is in the neck and comprises of two associated curves. A thin band of tissue known as the isthmus connects the lower two-thirds of the lobes. The thyroid gland is a butterfly-shaped organ beneath the Adam's apple in the neck. The spherical thyroid follicle, which is lined with follicular cells (thyrocytes) and occasionally parafollicular cells and has a colloid-filled lumen, is the thyroid gland's functional unit at a microscopic level.
Three hormones are released by the thyroid gland: the two thyroid chemicals - triiodothyronine (T3) and thyroxine (T4) - and a peptide chemical, calcitonin. The metabolic rate, protein synthesis, and growth and development of children are all influenced by thyroid hormones. Calcium homeostasis is affected by calcitonin. The anterior pituitary gland secretes thyroid-stimulating hormone (TSH), which controls the two thyroid hormones. The hypothalamus makes thyrotropin-releasing hormone (TRH), which controls TSH.
C(t) = 120\(e^{-0.099t\)
So at 12cmg
12 = 120\(e^{-0.099t\)
1 = 10\(e^{-0.099t\)
1/10= \(e^{-0.099t\)
log1/10 = -0.099t
-2.3 = -0.099t
t = 2.3/0.099
t = 23.23 sec.
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LO NECESITO YA!! PORFA!! II. Teniendo en cuenta el anterior cladograma califica los siguientes enunciados como falsos o verdaderos: a. El ginkgo comparte con el helecho la característica de poseer vasos conductores. (F/V) b. Se puede decir que toda planta de girasol posee flores, semillas y sistema vascular. ( V ) c. Los musgos carecen de xilema y de floema para transportar el agua y los nutrientes. (F/V) d. Un musgo carece de semillas, pero tiene protegidos sus embriones. (F/V)
Answers
Answer:
I dont speak spanish
Explanation:
what determines whether the effect of an allele is good or bad
Answers
The effect of an allele is determined by the environmental context and the overall genetic makeup of an individual.
An allele is a variant form of a gene.
Whether an allele is considered good or bad depends on how it interacts with other alleles and the environment in which it is expressed. In some cases, an allele may have positive effects on an individual's fitness, while in other cases, it may have negative effects or be neutral.
Factors such as genetic background, epistatic interactions, and environmental conditions can influence the outcome of an allele's effect on an organism's phenotype.
Summary: The effect of an allele being good or bad depends on the interaction between the individual's genetic makeup and the environment in which it is expressed.
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How many new strands of DNA are made at the end of DNA replication?
Answers
Answer:
Brainliest pls
Explanation:
Finally, an enzyme called DNA ligaseseals up the sequence of DNA into two continuous double strands. The result of DNA replication is two DNA molecules consisting of one new and one old chain of nucleotides.
The relative concentration of solute inside and outside a cell can cause water molecules to move across the membrane. Which phrase would be an alternative title to the diagram
A. Facilitated Diffusion Across a Membrane
B. Osmosis Across a Membrane
C. Exocytosis in a Cell
D. Active transport in a cell
Answers
The movement of water across a gradient is called osmosis.
What is the effect of excess heat or temperature on an enzyme.
Answers
Answer:
As the temperature rises further, the enzyme's activity decreases and eventually stops because the enzyme becomes denatured at high temperatures. Proteins are enzymes. The bonds separating amino acids are broken at very high temperatures. The enzyme's shape changes as a result of this.
Part C Part complete
Predict polypeptides produced when (UUA)n is used with an E. coli system.
Select all that apply.
Answers
It is important to note that the actual polypeptides produced will depend on the specific context of the mRNA sequence, the ribosomes and tRNA molecules available, and other factors affecting translation efficiency and accuracy.
The (UUA)n codon codes for the amino acid leucine. When used with an E. coli system, the polypeptides that may be produced depend on the surrounding codons and the specific mRNA and ribosome used for translation. However, some possible polypeptides that may be produced include:
A polypeptide consisting entirely of leucine residues, if the mRNA contains only (UUA)n codons and is translated by ribosomes with no errors or premature termination.
A polypeptide with multiple leucine residues interspersed with other amino acids, if the mRNA contains (UUA)n codons along with other codons specifying different amino acids.
A truncated polypeptide if premature termination occurs due to an error in translation or a nonsense mutation in the mRNA.
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What are two differences that happen when fall changes to winter?
Answers
Two differences between the events which occurs between fall and winter are as follows
In fall, temperature will start to reduce while in winter temperature will start increasing In fall, leaves usually fall off trees while in winter there is absence of leaves on trees.What is meant by winter?Winter simply refers to that season or period of the year in which the temperature is very cold. This means that it a period characterized by rise in temperature. During this period the weather is usually colder compared to the autumn period.
That being said, on the other hand, a period of autumn ( fall ) the weather is hotter due to the drop in the temperature and also the leaves on trees do usually get dried, change color and fall down.
In conclusion, we can now confirm from the explanation given above that the fall is a period also known as the autumn.
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This peripheral blood smear is from a 42-year-old man with a past medical history significant for hypertension who presents with progressive fatigue and weakness over the past month. He indicates generalized abdominal fullness. Laboratory data include: WBC = 129.7 x 10^3/uL , RBC = 4.43 x 10^6/uL , HGB = 13.0 g/dL, MCV = 91 fL, RDW = 15%, and PLT = 309 x 10^3/uL. Identify the following cells and answer the accompanying questions.
1.What cytochemical stain might be done on the peripheral blood smear to aid in diagnosis?
2.What would you expect the results of the special stain to be ?
3.Explain your answer Calculate the Mean corpuscular Hemoglobin Concentration
4.Calculate the Hct What is this disease?
5.Name the chromosomes associated with this disease. Explain the genetic translocation associated with this disease
Answers
1. A cytochemical stain that might be done on the peripheral blood smear to aid in diagnosis is a myeloperoxidase (MPO) stain. 2. If a myeloperoxidase (MPO) stain is performed, the results would be negative. 3. The mean corpuscular hemoglobin concentration (MCHC) cannot be determined with the given data since the hematocrit (Hct) value is not provided.
1. A cytochemical stain that might be done on the peripheral blood smear to aid in diagnosis is a myeloperoxidase (MPO) stain.
2. In this case, if a myeloperoxidase (MPO) stain is performed, the results would be negative.
3. The mean corpuscular hemoglobin concentration (MCHC) is calculated by dividing the hemoglobin concentration (HGB) by the hematocrit (Hct) and multiplying by 100. However, the information provided in the question does not include the Hct value, which is necessary for calculating the MCHC. Therefore, it is not possible to determine the MCHC with the given data.
4. The hematocrit (Hct) can be calculated by multiplying the red blood cell count (RBC) by the mean corpuscular volume (MCV) and dividing by 10. In this case, the RBC count is 4.43 x 10^6/uL and the MCV is 91 fL. Using the formula: Hct = (4.43 x 10^6) x (91) / 10, the calculated Hct is 40.273%.
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Universal donors are those with an O negative blood type. Why?
Answers
O-negative blood is considered the "universal donor" blood type because it does not contain any antigens, which are substances on the surface of red blood cells that can trigger an immune response, making it compatible with all blood types.
Individuals with different blood types have different antigens on the surface of their red blood cells. For example, individuals with type A blood have A antigens, individuals with type B blood have B antigens, and individuals with type AB blood have both A and B antigens. When blood with different antigens is mixed, it can cause a reaction, and the immune system can attack the foreign blood, leading to hemolysis (the destruction of red blood cells).
In contrast, O-negative blood does not have any antigens, making it compatible with all blood types. This means that individuals with O-negative blood can donate blood to any individual, regardless of their blood type, as they have no antigens to trigger an immune response in the recipient's body. However, individuals with O-negative blood can only receive blood from other O-negative individuals.
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Which phrase best describes rough ER?
Answers
Answer:
mitochondria
Explanation:
Find the area inside the cardioid =6−4cos(theta).
Answers
Numerous natural formations display the cardioid shape, which has biological relevance, which is determined by the equation r = 6 - 4cos().
The form of some animal hearts, including those of some cephalopods and sea gastropods, is one striking example. These species' cardioid-shaped hearts have developed to help them efficiently pump blood throughout their bodies. Their physiological demands are supported by the high blood flow that is maintained by the cardioid shape's narrowing apex. Additionally, certain flower species, such as several cyclamen species, have a cardioid-like arrangement of their petals. By offering an ideal landing site, its design helps to draw pollinators. The cardioid shape thus exhibits functional modifications for circulation and reproduction in biology.
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--The complete Question is, What is the biological significance of the cardioid shape in nature? Explain any patterns or phenomena observed in biological structures that resemble or approximate a cardioid shape. How does the equation for the cardioid, given as r = 6 - 4cos(θ), relate to these biological structures? Discuss any potential implications of the equation for understanding the functions or adaptations of organisms that exhibit cardioid-like structures. Provide examples of organisms or biological systems where the cardioid shape is prominent and explain how this shape benefits their survival, reproduction, or other biological processes. --
Between which two atoms of water are hydrogen bonds are formed?
Answers
Answer:
hydrogen bonds form between neighboring hydrogen and oxygen atoms
Where are photoreceptors located.
Answers
Answer:
The Retina
Explanation:
The photoreceptors lie at the back of the retina
DNA has two strands. If the sequence of nucleotides of one strand was known, is it possible to use that information to determine the sequence of the second strand? Explain your reasoning for your response using an example DNA sequence. and this is for biomedical science.
Answers
Answer:
Yes
Explanation:
DNA, which is the genetic material, is a double-stranded molecule i.e. possess two strands. Each strand is made up of a sequence of nucleotide base, which are complementary to one another. The complementary base pairing rule as proposed by Chargaff states that Adenine (A) base will always hydrogen pair with Thymine (T) base while Guanine base (G) will always pair with Cytosine (C) i.e. A-T, G-C.
For example, If the sequence of nucleotides of one strand was CTAGCGGATC, the sequence of nucleotide of the other strand will be GATCGCCTAG. Hence, based on this question, the information of the sequence of base on one strand can be used to determine the sequence of the second strand.