Place the events of the propagation of an action potential in an unmyelinated axon.
What will be an ideal response?
1. initial action potential produced at a trigger zone
2. action potential generates local currents
3. depolarization of adjacent areas of the membrane
4. threshold reached in adjacent areas of the membrane
5. new action potential produced
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Erection
a. involves dilation of the arterioles supplying the sponge-like vascular spaces of the penis b. results from cGMP production induced by nitric oxide c. occurs when the seminiferous tubules of the penis become engorged with sperm d. occurs in response to sympathetic nervous stimulation of the penis e. has both a and b characteristics
The posterior aspect of the body has ________ enclosed cavities.
A. 5 B. 4 C. 2 D. 1 E. 3
Which of the following initiates the breakdown of carbohydrates?
A) Salivary amylase B) Stomach acid C) Bile salts D) Peristalsis
Glands are formed from ________.
A. epithelial tissue B. connective tissue C. muscle tissue D. nerve tissue