In a transverse section, each skeletal muscle is composed of ______, which are bundles of muscle fibers.
Answers
In a transverse section, each skeletal muscle is composed of fascicles, which are bundles of muscle fibers.
Skeletal muscles are composed of multiple layers of connective tissue that surround and support the muscle fibers. In a transverse section, which is a cross-sectional view of the muscle, the internal structure of the muscle can be observed.
The primary structural unit of a skeletal muscle is the fascicle. Fascicles are bundles of muscle fibers (also known as muscle cells or myofibers) that are grouped together.
Each fascicle is surrounded by a connective tissue layer called the perimysium, which provides support and protection to the muscle fibers within.
The arrangement of fascicles within a muscle can vary, contributing to the functional properties of the muscle. The fascicles, in turn, consist of numerous individual muscle fibers that are responsible for generating force and enabling muscle contractions.
The muscle fibers are long, cylindrical cells that contain specialized structures called myofibrils, which are responsible for the contraction of the muscle.
Overall, the fascicles serve as the structural units that make up skeletal muscles, and within each fascicle, there are numerous muscle fibers that work together to facilitate movement and generate force.
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Related Questions
If you know this please help me and explain why
Answers
The ionization energy of the elements increases as one moves up a given group because the electrons are held in lower-energy orbitals, closer to the nucleus and thus more tightly bound (harder to remove). Based on these two principles, the easiest element to ionize is francium and the hardest to ionize is helium.
starch is used as an energy storage form by which of the following
A. plants
B. carnivores
C. decomposers
Answers
Answer: A - plants
Explanation: Starch serves as energy storage in plants.
Place the structures involved in cerebrospinal fluid (CSF) circulation in order from the initial production of CSF to when the CSF is absorbed into venous circulation.
- arachnoid villi - median and lateral apertures - choroid plexus - ventricles - dural sinuses - subarachnoid space
Answers
The structures involved in cerebrospinal fluid (CSF) circulation in order from the initial production of CSF to when the CSF is absorbed into venous circulation are choroid plexus - ventricles - arachnoid villi - subarachnoid space - median and lateral apertures - dural sinuses.
Cerebrospinal fluid (CSF) is a transparent, colorless liquid that surrounds the brain and spinal cord. Its function is to supply nutrients and remove metabolic waste products from the central nervous system (CNS).
The initial production of CSF occurs in the brain's ventricles, specifically in the choroid plexus. Then, the CSF flows through the ventricles before entering the subarachnoid space.
The absorption of CSF into venous circulation takes place via arachnoid villi, followed by its drainage into the dural sinuses, and finally returned to the circulatory system.
Hence, the proper sequence of structures involved in CSF circulation is as follows: choroid plexus - ventricles - subarachnoid space - arachnoid villi - dural sinuses - median and lateral apertures.
Overall, CSF plays a critical role in maintaining the proper functioning of the CNS.
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This problem leads you through the derivation of a corrected equation for RF in yeast tetrad analysis that takes into account double crossover (DCO) meioses. A yeast strain that cannot grow in the absence of the amino acid histidine (his−) is mated with a yeast strain that cannot grow in the absence of the amino acid lysine (lys−). Among the 400 unordered tetrads resulting from this mating, 233 were PD, 11 were NPD, and 156 were T.
a. What types of spores are in the PD, NPD, and T tetrads?
b. Are the his and lys genes linked? How do you know?
c. Using the simple equation RF = 100 × [NPD +(1/2)T]/total tetrads, calculate the distance in mapunits between the his and lys genes.
d. If you think about all the kinds of meiotic eventsthat could occur (refer to Fig. 5.24), you can see that the calculation you did in part (c) may substantially underestimate RF. What kinds of meioses (NCO, SCO, or DCO) generated each of the tetrad types in this cross?
e. What incorrect assumptions does the simple RFequation you used in part (c) make about themeiotic events producing each type of tetrad? Whencould these assumptions nevertheless be correct?
f. Use your answers to part (d) to determine thenumber of NCO, SCO, and DCO meioses thatgenerated the 400 tetrads.
g. Use your answers to part (f) to write a generalequation that relates the number of DCO meiosesto the number of the various tetrad types. Thenwrite another general equation that computes thenumber of SCO meioses as a function of the number of the various tetrad types.
h. Based on your answer to part (f), calculate theaverage number of crossovers per meiosis (m)between his and lys.
i. Use your answer to (h) to write an equation for min terms of NCO, SCO, and DCO meioses.
j. What is the relationship between RF and m?
k. Use your answer to part (j) to write a corrected equation for RF in terms of SCO, DCO, and NCO meioses. l. Using your answer to part (g), rewrite the corrected RF equation from part (k) in terms of the numbersof the various tetrad types.
m. The equation you just wrote in part (l) is a corrected equation for RF that takes into account doublecrossovers that would otherwise have been missed. Use this improved formula to calculate a moreaccurate distance between the his and lys genes than the one you calculated in part (c).
Answers
Answer:
d and e
Explanation:
Which of the following best describes evidence that an evolutionary biologist would not use to support the modern concept of evolution?
A O Two closely related species are found in different geographical areas.
B O Two distantly related species have the same method of reproduction.
C O Two species that are different in appearance share similar patterns of development.
D O Two species that are similar in appearance have different genetic codes.
Answers
Evolution is the shift in a biological population's heritable traits over successive generations.
Thus, These traits are the expressions of genes, which are passed down through reproduction from parent to offspring. Genetic recombination and mutation frequently result in variation within a population.
This variety is subjected to evolutionary processes like natural selection (including sexual selection) and genetic drift, which cause some traits to become more or less prevalent within a population. This is when evolution happens.
Heritable traits evolve over successive generations as a result of shifting evolutionary forces that determine whether a trait is prevalent or rare within a population. At every level of biological organization, biodiversity is a result of this process of evolution.
Thus, Evolution is the shift in a biological population's heritable traits over successive generations.
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which part of the brain is associated with feelings of empathy, shame, and moral reasoning?
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The part of the brain that is associated with feelings of empathy, shame, and moral reasoning is the prefrontal cortex, specifically the ventromedial prefrontal cortex (vmPFC).
The vmPFC is located in the frontal lobe of the brain and plays a crucial role in social and emotional processing. It is involved in various higher-order cognitive functions, including decision-making, emotional regulation, and moral judgments. Damage or dysfunction in the vmPFC can lead to impairments in empathy, moral reasoning, and social behavior. Research studies have shown that the vmPFC is activated during tasks that require moral judgments and evaluating social emotions. It helps integrate emotional responses, social information, and personal values to guide moral decision-making. Additionally, the vmPFC interacts with other brain regions involved in emotion processing, such as the amygdala and anterior cingulate cortex, to generate appropriate emotional responses and moral judgments in social situations.
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While Earth’s atmosphere contains greenhouse gases, Earth does not experience runaway warming, as on Venus, because
A-Earth’s mass is not sufficient to provide gravity to hold a dense enough atmosphere
B-Earth is far enough from the sun to avoid having too much greenhouse gas
C -Earth’s atmosphere is 99% oxygen and nitrogen, which are not greenhouse gases
D -Albedo from Earth’s cloud deck reflects 99% of the sun’s radiation
Answers
B ig and C too...............
a glove-like dermatitis, diarrhea, and dementia are signs of?
Answers
Glove-like dermatitis, diarrhea, and dementia are signs of pellagra. Pellagra is a dietary deficiency disease that is caused by a deficiency of vitamin B3 (niacin) in the diet. It is a metabolic condition characterized by a dermatitis rash, diarrhea, and dementia.
It is a rare disease that is most commonly seen in poor or malnourished populations in underdeveloped countries.Signs and symptoms of PellagraThe most common symptoms of Pellagra include the following:Glossitis, which is an inflamed tongue and lipsPhotosensitivityDermatitis, which is an itchy rash that is similar to a sunburnSymmetrical hyperpigmentation (darkened areas of skin)Hallucinations and dementiaDepression and confusionGastrointestinal symptoms, including abdominal cramps, nausea, and diarrhea Weakness and fatigue Pellagra is a serious condition that can be fatal if left untreated.
It can be easily treated with a diet that is rich in niacin and other essential nutrients. If you or someone you know is experiencing symptoms of Pellagra, it is important to seek medical attention right away.
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you found some fossil leaves in a sedimentary siltstone with rare pumice fragments. you really need to know how old the fossil leaves are so you can understand what the diversity of your forest was like during a specific time period. you send in your sample and get an age of 2,700,500 years! the half-life of your sample is 245,500 years. during which epoch did the plants live?
Answers
- Age of the fossil leaves: 2,700,500 years
- Half-life of the sample: 245,500 years
- Epoch during which the plants lived: Pleistocene
Detailed explanation to the above given short answers are written below,
Based on the given information, the age of the fossil leaves is determined to be 2,700,500 years. This age represents the time since the leaves were deposited and preserved in the sedimentary siltstone.
The half-life of the sample is stated as 245,500 years. The half-life is the time it takes for half of the radioactive isotope in the sample to decay.
To determine the epoch during which the plants lived, we need to understand the geological timescale.
The Pleistocene epoch is characterized by significant glaciations and spans from approximately 2.6 million to 11,700 years ago. Given that the age of the fossil leaves is 2,700,500 years, it falls within the Pleistocene epoch.
Therefore, the plants from the fossil leaves lived during the Pleistocene epoch. This information is valuable for understanding the diversity of the forest during that specific time period and provides insights into the ancient ecosystems and plant communities that existed in the past.
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Many farmers and gardeners compost their plant and animal waste. The living material naturally decays
in compost bins, forming a dirt-like substance that's rich in nutrients. The next season, farmers use this
substance as a natural fertilizer for their crops.
A biology student has grown tomato plants for several years. Until now, he used an artificial fertilizer
formulated for tomato plants. This fertilizer caused his plants to grow faster and taller than they grew in
unfertilized soil. The student wants to know whether using natural compost will cause his tomato plants
to grow faster and taller than his artificial fertilizer.
Answer the following questions to plan an investigation using the steps of the scientific method and help
the student find the answer to his question.
Part C
Construct at least two possible hypothesis for the students experiment?
Answers
The student's experiment may test the following hypothesis: Using natural compost will help his tomato plants to grow more quickly and higher than using chemical fertiliser.
What are the benefits of synthetic fertiliser?They are a fantastic option for helping plants in serious distress from nutritional deficits because they work faster than organic alternatives. simple to handle These fertilizers, which come in the form of dry, granular pellets or items that dissolve in water, also offer even, regular feeding. Inexpensive.
What are the two benefits and drawbacks of organic and inorganic fertilizers?Slow-release organic fertilisers gently release nutrients into the soil. Burns from fertiliser occur when nutrients are released too quickly by synthetic fertilisers. Organic fertilizers nourish the soil in contrast to inorganic fertilizers, which damage the ecology.
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diplodocus had a tail that was unique compared to other sauropods in that it: group of answer choices was very long and flexible like a whip. was unusually short given the length of its neck. was much more muscular. has large spikes along the top for defense.
Answers
The tail of a Diplodocus was unique compared to other sauropods in that it was very long and flexible, like a whip. This allowed Diplodocus to use its tail as a defense mechanism or for communication.
The tail was made up of multiple vertebrae that were connected by muscles and tendons, giving it the flexibility to move in different directions. The length and flexibility of the tail helped Diplodocus to maneuver and navigate its environment.
It is important to note that while Diplodocus had a long and flexible tail, it did not have large spikes along the top for defense, as stated in one of the answer choices.
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Parent organisms and offspring have what DNA?
Answers
Answer:
If the parent reproduces sexually, it's offspring will inherit exactly half of it's DNA. The other half is inherited from the other parent. If the parent reproduces asexually, it's offspring will be a clone (i.e. have the same DNA).
Explanation:
How do you know if you have an intestine problem?
Answers
The most typical signs of intestinal issues are stomach pain, bloating, diarrhoea, constipation, and changes in bowel habits.
How do you tell if you have a problem with your intestines?Stomach pain, bloating, diarrhoea, constipation, and changes in bowel habits are the most common symptoms of intestinal problems.In addition, you can have fatigue, weight fluctuations, nausea, appetite loss, flatulence, and rectal bleeding.You should consult your doctor if you encounter any of these symptoms in order to identify the underlying reason and receive the proper care.There are several symptoms to watch out for if you think you may have an intestinal issue. These include vomiting, weight loss, changes in bowel habits, trouble passing stool, bloody stool, bloating, gas, and stomach pain.It is crucial to keep in mind that some of these symptoms may also be brought on by other conditions, like food allergies or food poisoning. Therefore, if you have any of these symptoms, it is important to see your doctor for a diagnosis.The doctor may suggest a course of treatment to assist control the disease if the tests identify an intestinal problem. Changes to your diet, prescription drugs, or even surgery may all be used as treatments.To maintain the health of your intestines and avoid any more issues, it's critical to adhere to your doctor's recommendations.To learn more about intestine problem refer to:
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How is Earth’s outer layer similar to a cracked hard-boiled egg?
Answers
Earth's outer layer and cracked heard boiled egg has thin, brittle shell.
The Mantle of the Earth is like the egg white and the core of the earth lies in the center like the egg yolk. The Earth's brittle crust is broken into pieces that Geologists call Plates.
A hard boiled egg has its shell which is a thin layer and is also similar to the Earth's Crust. The layer of Earth is something like an Egg and forms as many similarities. The difference is that the Earth's layer is uneven and rough as opposed to the flat whereas the surface of the egg is smooth and even.
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Uses energy to pump H+ across a membrane; energy is moved through a chain of proteins. please help
Answers
Answer:
energy
Explanation:
energy is used to pump hydrogen ions across the mitochondrial inner membrane, from the matrix into the intermembrane space
i need help asap!! “Describe the structure of DNA. Be sure to include information about the directionality of the strands and how the molecules are bonded together.”
Answers
Answer:
DNA is consist of two strands that are coiled together to form a double helix structure in which both the strands are anti-parallel. The direction of one strand is from 5' to 3' and the other has 3' to 5'.
DNA is made up of nucleotide, phosphate group and deoxyribose sugar. The two anti-parallel strands on DNA are composed of nucleotide and bonded with hydrogen bond. There are four nitrogenous bases present in each nucleotide e adenine (A), guanine (G), Thymine (T) and cytosine (C). Where A and T are bonded with double hydrogen bond and G and C are bonded with triple hydrogen bond present complementary to each other in both the strands.
sugar -phophate group forms the backbone of the DNA.
At what point did the two groups of anthropods split, and why?
Answers
Hexapoda (insects and springtails), Chelicerata (arachnids), Crustacea (crustaceans), and Myriapoda (myriapods) are the four subphyla of extant forms that make up the phylum Arthropoda.
What is meant by Arthropods?Any member of the invertebrate animal group (Arthropoda), which includes insects, arachnids, and crustaceans, that has a segmented body, jointed limbs, a typically chitinous exoskeleton that sheds at regular intervals, and a ventral chain of ganglia connecting to the dorsal anterior brain.
Animals with joined legs are known as arthropods. Arthropoda, the name of the phylum, refers to invertebrates with jointed legs and an exoskeleton.
The existence of numerous joints, a chitinous exoskeleton, segmentation, and an open circulatory system define an arthropod as a living invertebrate. The internal organs of the organisms are shielded by the chitinous exoskeleton.
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How do you think the ocean will change over the next 100 years?
Answers
The image shows groundwater zones.
Top to bottom: Porous rock or soil, Water, Impermeable rock. Zone 1 is at the top of porous rock. Zone 2 is between porous rock and water. Zone 3 is in the Water. Zone 4 is between the Water and Impermeable rock.
Which is the saturated zone?
1
2
3
4
Answers
Answer:
The answer is 3
Explanation:
Hope this helps
Answer:3 or c
Explanation:
Can you please answer this
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El aumento del oxígeno durante el Proterozoico produjo una gran extinción de los organismos anaerobios primitivos y una disminución del efecto invernadero que condujo a intensas glaciaciones en todo el planeta.¿ Se puede afirmar que este fenómeno fue un proceso inducido por los seres vivos?
Answers
Answer:
No, la evidencia geológica indica que el aumento de oxígeno (O2) durante este período fue producto de un fenómeno conocido como la gran oxidación
Explanation:
El Proterozoico fue un período geológico que comenzó aproximadamente 2.500 millones de años atrás y finalizó hace aproximadamente 540 millones de años. La Gran Oxidación fue un catástrofe medioambiental que ocurrió aproximadamente 2.400 millones de años atrás, este fenómeno causó la extinción masiva de una importante cantidad de microorganismos anaeróbicos. Si bien el oxígeno comenzó a ser generado como producto de la fotosíntesis antes del Proterozoico, se sabe que los niveles de O2 aumentaron drásticamente debido a la saturación de los sumideros químicos (oxidación de azufre y hierro) y al aumento en el enterramiento del carbono (es decir, debido a procesos abióticos). De este modo, el excedente de oxígeno comenzó a acumularse en la atmósfera, siendo tóxico para aquellas especies anaeróbicas que dominaron durante este período y causando la extinción masiva de estas especies.
explain the difference in ray and disc flowers in composites
Answers
The difference between in ray and disc flower composites is that. The outermost flowers in the capitulum are called ray florets, while the inner flowers are called disc florets.
Composites or Asteraceae is one of the largest families of plants, consisting of more than 23,000 species. Their structure includes two types of flowers: the disk florets and the ray florets.
The difference between ray and disc flowers in composites: Ray flowers are the large, petal-like flowers surrounding the center of the head. They are infertile and do not produce seeds. Their function is to attract pollinators with their colors and nectar and to protect the inner disc florets from damage. Disc flowers are tiny flowers in the center of the head.
They are usually hermaphroditic and fertile, and they produce both nectar and pollen. They are responsible for producing the seeds, which are surrounded by bristles or scales, collectively called pappus. The composite inflorescence is a collection of flowers that looks like a single flower. The individual flowers that make up this composite flower are known as florets. The head of the composite flower is known as the capitulum.
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PLEASE HELP!
Which of the following is not a future consequence of nuclear energy use?
O Increased safety and innovation
O Partial reuse of energy fuel rods
O Smaller nuclear power facilities
O Higher costs for new plant designs
Answers
Answer:
It's either A:Increased safety o and innovation, or C:Smaller nuclear power facilities.
Explanation:
Option A: Using nuclear power is never safe. There could be a problem with electrical wires somewhere in the power plant or someone could mess up and everything could go wrong, someone could get hurt. Option C: If using nuclear power becomes more popular then we would need bigger facilities to produce all the power we would use. Therefore smaller is not an option if we start using nuclear power regularly.
Sorry about the option A answer. The wires thing was kinda just me, my dad is a carpenter so....yeah.
Answer:
Either B or D
Explanation:
I took the test twice and both A and C are wrong. I would think that B is the correct answer becuase it says only partial reuse.
which terms best describe the class of questions that insel and young were addressing when they studied the effect of antidiuretic hormone on monogamous voles by experimentally increasing the number of receptors in the brain?
Answers
A hormone that aids in blood vessel constriction and aids the kidneys in maintaining the proper quantities of salt and water in the body. This aids in regulating blood pressure as well as urine flow.
What kind of hormone is an antidiuretic, for instance?Vasopressin (ADH), argipressin, desmopressin, lypressin, ornipressin, oxytocin, and terlipressin are all members of the antidiuretic hormone class. Other unspecified substances include carbamazepine and chlorpropamide.
Does ADH make you heart beat faster?ADH had the greatest impact on decreasing cardiac output and cardiac rate at an equal percent pressure elevation, while AN had the least impact. Following arterial baroreceptor denervation, ADH continued to decrease heart rate while AN increased it, indicating negative and positive nonbaroreceptor chronotropic effects, respectively.
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Have you ever seen a bear attack?
Answers
Answer:
no
Explanation:
All deserts have high daytime temperatures.
Please select the best answer from the choices provided
T
F
Answers
Answer:
False, I got it right on my test
Answer:
False
Explanation:
Fun fact: What most people know is that Antarctica is cold. What most people don't know is that due to its low rainfall, it's considered a desert.
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How finance might contribute to a rise to ones stress level as you move from school to a higher education institution
Answers
Finance contributes a rise of stress level as a person move from school to a higher education institution because the expenses of that individual increases.
Stresses experienced by a studentThe repayment of loans, the cost of education, borrowing money for college, to find a job after school and the academic challenge of course work are the stress which experience a student in its academic years so we can conclude that finance has high contribution on the increase of stress level on student.
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9. The human male reproductive system is
represented to the left. Which structure produces cells
that have the potential to become gametes?
A
а. А
b. B
C С
d. D
Answers
Answer:
A. A
Explanation:
It's the testicles
Which one of the following does NOT describe a use of a scientific model?
Answers
Answer: what are the options?
Explanation:
I would love to help :)
What is one of the main functions of the large intestines?
break down food chemically
break down food physically
absorb nutrients
absorb water
Answers
Answer:
absorb water and mineral salts.
Explanation:
Answer:
D. absorb water