Match the structure with the description.
a. 1
b. 2
c. 3
d. 4
e. 5
f. 6
g. 7
h. 8
i. 9
j. 10
k. 11
1. _____ Pulmonary artery
2. _____ Tricuspid valve
3. _____ Pulmonary vein
4. _____ Mitral valve
5. _____ Right ventricle
6. _____ Left ventricle
7. _____ Lungs
8. _____ Aortic semilunar valve
9. _____ Right atrium
10. _____ Pulmonary semilunar valve
11. _____ Left atrium
1. e. 5
2. b. 2
3. g. 7
4. i. 9
5. c. 3
6. j. 10
7. f. 6
8. k. 11
9. a. 1
10. d. 4
11. h. 8
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Select the answer that correctly orders the events that occur when a nerve signal reaches the axon terminal.(1) The neurotransmitters bind to receptors on the postsynaptic cell.(2) The postsynaptic cell is stimulated to initiate a nerve signal.(3) Synaptic vesicles release neurotransmitters via exocytosis.(4) Neurotransmitters diffuse across synaptic cleft.
A. 1, 2, 3, 4 B. 2, 3, 4, 1 C. 3, 4, 1, 2 D. 4, 3, 1, 2 E. 2, 3, 1, 4
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