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MCAT Biology Practice Test 10: Cellular Communications
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MCAT Biology Practice Test 10: Cellular Communications
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25 Questions

1. Which of the following is associated with both the nervous system and the endocrine system?
2. The brain has only about 2 percent of the total body mass but consumes about 25 percent of the available glucose. Why is this?
3. Schwann cells are a major component of the _____ system.
4. The posterior pituitary is responsible for the secretion of which hormones?
5. Nerve agents such as VX and sarin impair signal transduction through the neuromuscular synapse by
6. Steroid hormones control cell action by
7. What differentiates a stimulatory neuron from an inhibitory neuron?
8. The function of the nodes of Ranvier is to
9. A nerve is
10. Which of the following is a CNS depressant?
11. What neurotransmitter combination is found only in the brain?
12. The parathyroid glands are responsible for
13. Certain cell types are found only in specific tissues. In which of the following tissues is a glial cell found?
14. The 'fight-or-flight' response arises from the release of what hormone(s)?
15. Which of the following is best associated with the regulation of metabolism?
16. An infant suckling on its mother’s breast causes the release of _____ in the mother.
17. The portions of the spinal cord that stimulate digestion are the _____ nerves.
18. The nucleus of a neuron resides in
19. The forebrain consists of all of the following EXCEPT the
20. Iodine is an essential element because it is associated with what function?
21. During the transmission of an action potential down a neuron, what is occurring during the depolarization phase?
22. The regulation of water concentration in the blood is accomplished by
23. At a specific point along a neuron that is propagating an action potential, the sequence of action is
24. What cells produce the 'white' in the white matter of the CNS?
25. The master gland of the endocrine system is the

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