Preganglionic fibers of the autonomic efferent pathway are ________ and secrete ________.

A. myelinated; acetylcholine (ACh) and norepinephrine(NE)
B. myelinated; norepinephrine (NE)
C. myelinated; acetylcholine (ACh)
D. unmyelinated; norepinephrine(NE)
E. unmyelinated; acetylcholine (ACh)


Answer: C

Anatomy & Physiology

You might also like to view...

Which muscles aid in the act of swallowing?

A. Muscles of mastication B. Two of the choices are correct. C. Muscles that move the tongue D. Muscles of the pharynx E. Muscles of facial expression

Anatomy & Physiology

Based on its range of motion, the elbow is classified as a(n) ________ joint.

A. ellipsoid B. biaxial C. uniaxial D. multiaxial E. gliding

Anatomy & Physiology

The superior mesenteric ganglion receives preganglionic sympathetic neurons from the ________ segments of the spinal cord.

A. T5?T9 B. T2?T6 C. T1?T4 D. T10?T12 E. T7?T9

Anatomy & Physiology

Which of the following transport process uses vesicles formed at the plasma membrane to take up extracellular substances and import them into the cell?

a) endocytosis b) exocytosis c) facilitated diffusion d) osmosis e) Both endocytosis and exocytosis.

Anatomy & Physiology