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15. ATP hydrolysis B
D. returns to extended conformation
E. exposes myosin binding site on actin
16. Fast- and slow-twitch fibers differ in all of the following ways EXCEPT
A. number of neuromuscular junctions.
B. number of blood vessels.
C. number of mitochondria.
D. amount of myoglobin.
E. amount of glycogen and fat.
17. Which of the following is NOT a lymphoid tissue?
A. Bone marrow
B. Lymph nodes
E. All of the above are lymphoid tissues.
Match the hormone on the left with its action on the right.
(Answers on the right may be used more than once or not at all, but choose only 1
answer for each question) . These matchings are worth 1 point each.
A. decrease blood presure
18. epinephrin B
B. increases heart rate
19. insulin D
C. results in concentrated urine
20. oxytocin E
D. decreases blood glucose levels
E. promotes mother offspring bonding MCDB 1B Midterm Green (2) Version: 2 Page: 3 21. The action potential.....(Mark all that apply)
A. is caused by voltage-gated sodium channels.
B. is slowed down if a nerve cell has myelin around it.
C. is blocked at the nodes of Ranvier.
D. travels along all axons at the same speed.
E. does not change in magnitude as it travels down the axon.
22. Which of the following statements about the sensory cell is FALSE?
A. Changes in the stimulus strength lead to changes in the size of action potentials
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This note was uploaded on 02/13/2014 for the course MCDB 1B taught by Professor Weimbs during the Winter '08 term at UCSB.
- Winter '08