You can feel when your hair is being touched because ________.
A. hair follicles have neurons associated with them
B. hairs are made of living neurons
C. the arrector pili muscle detects movement of the hair
D. hairs are made of living epidermal tissue
Answer: A
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The type of neuronal circuit that ensures that we continue to breathe while asleep is a ________ circuit.
A. converging B. parallel-after-discharge C. diverging D. reverberating E. None of the choices is correct.
During sun exposure the skin is responsible for the synthesis of Vitamin ________________________________________, which is essential in calcium control
Fill in the blank(s) with correct word
Contraction of the papillary muscles would
A. prevent the AV valves from protruding into the atria. B. open the semilunar valves. C. eject blood from the ventricles. D. close the semilunar valves. E. cause the atria to eject their contents into the ventricles.
How many nuclei do most body cells contain?
A) 1 B) 2 C) 3 D) 4 E) over 10