Which of the following are effectors?
A. Receptors
B. Stimuli
C. Reflexes
D. Glands
E. Sense organs
D. Glands
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What is the dilated sac behind the nipple from which milk is ejected called?
A. Lactiferous duct B. Lactiferous sinus C. Lactiferous bulb D. Areola E. Lacteal
Eskimos wear a great deal of clothing and have limited exposure to ultraviolet light, but do not suffer from vitamin D deficiency. A possible explanation is
A. they do not require sunlight for vitamin D formation. B. their bodies produce vitamin D another way. C. they do not need vitamin D. D. their exposure to ultraviolet light in the summer will last for a year. E. they get enough vitamin D in their diet of fish and marine mammals.
In a sarcomere, which letter is associated with the light band that contains thin filaments only?
A. Z B. A C. M D. H E. I
After acetylcholinesterase acts, the synaptic terminal
A) reabsorbs the acetylcholine. B) reabsorbs the acetate. C) reabsorbs the choline. D) reabsorbs axoplasm. E) pinches off and a new terminal grows.