Which of the following organs has dual ANS innervation?

A. Arrector pili muscles
B. Iris
C. Most blood vessels
D. Adrenal medulla


Answer: B

Anatomy & Physiology

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Preganglionic fibers leave the CNS and then synapse on

A) postganglionic fibers. B) visceral reflex responses. C) motor neurons. D) ganglionic neurons. E) afferent neurons.

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____________________ forces require the cell to expend energy in transporting a substance across the membrane

Fill in the blank(s) with correct word

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The hormone calcitonin

A) stimulates osteoclast activity. B) decreases the rate of calcium excretion. C) decreases the rate of calcium absorption. D) decreases the level of calcium ion in the blood. E) stimulates osteoblasts and inhibits osteoclasts.

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