Which statement regarding dorsal and ventral roots is correct?
A. Dorsal roots carry efferent messages, while ventral roots carry afferent messages.
B. Dorsal roots carry sensory messages, while ventral roots carry afferent messages.
C. Dorsal roots carry motor messages, while ventral roots carry sensory messages.
D. Dorsal roots carry afferent messages, while ventral roots carry efferent messages.
Answer: D
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How many pairs of ribs are "floating ribs" that do not articulate with the sternum?
A. 5 B. 2 C. 7 D. 12 E. 10
The most abundant form of smooth muscle is
A. single-unit, which is also known as visceral smooth muscle. B. cardiac muscle, which is also known as visceral smooth muscle. C. multiunit, which is also known as visceral smooth muscle. D. multiunit, which is also known as varicose muscle. E. single-unit, which is also known as somatic nervous system muscle.
What happens to a muscle during an isometric contraction? a. It produces more calcium
b. It lengthens. c. It shortens. d. It is prevented from shortening. e. Sarcomeres are destroyed.
Keratinocytes
a. form the outer protective layer of the skin b. secrete interleukin 1 c. present antigens to helper T cells d. have characteristics a and b e. have characteristics a and c