What triggers the release of acetylcholine from a synaptic terminal?
A) release of calcium ions from the synaptic vesicles
B) graded potentials in the synaptic terminal
C) synaptic vesicles fuse to dendrites
D) diffusion of sodium ions out of the synaptic terminal
E) diffusion of calcium ions into the synaptic terminal
E
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Most muscles cross at least one
a) tendon b) joint c) bone d) ligament e) body plane
Using Figure 17.4, match the following:
1) Tricuspid valve.
2) Mitral valve.
3) Right atrium.
4) Left ventricle.
5) Pulmonary veins.
The anterior pituitary stimulates other endocrine organs by secreting a group of hormones called ___________.
A. releasing factors B. tropic hormones C. relay proteins D. target hormones
The cyclical process of contracting and relaxing of the precapillary sphincters is called ________.
Fill in the blank(s) with the appropriate word(s).