Structures marked J on the skin diagram are
A) sudoriferous glands.
B) smooth muscles.
C) sebaceous glands.
D) immature hair follicles.
E) sensory receptors.
E) sensory receptors.
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Which of the descriptions is not descriptive of REM (rapid eye movement) sleep?
A. It represents 20-25% of a person's "sleeptime." B. Visible movements of the eyes resembling those of one tracking the movements of objects in space, watching TV, and so on C. Oxygen consumption decreases by comparison to NREM sleep and in an alert wakeful state. D. Skeletal muscle activity is markedly reduced, except for the extraocular and respiratory muscles. E. Difficulty arousing the sleeper
Which is the correct order of action for the amphibian "balanced breath"?
A) Buccal cavity expands, glottis opens, spent air leaves lungs, buccal cavity contracts B) Buccal cavity expands, spent air leaves lungs, glottis opens, buccal cavity contracts C) Glottis opens, buccal cavity expands, buccal cavity contracts, spent air leaves lungs D) Spent air leaves lungs, glottis opens, buccal cavity expands, buccal cavity contracts
What is the half-life of a signal?
What will be an ideal response?
Acetylcholine (ACh) always has an excitatory effect.
Answer the following statement true (T) or false (F)