Question

1. autonomic nervous system fibers are involved in all of the following except

a) regulating gastrointestinal motility
b) contracting the muscles of the back to maintain posture
c) changing the diameter of the pupil
d) altering salivary gland secretion
e) adjusting heart rate and force

1. in the spinal cord, the large regions of white matter are known as

a) peduncles.
b) funiculi.
c) horns.
d) communicantes.

1. the tapered, bottom of the spinal cord that ends at l1 is called the

a) conus cervicis.
b) conus medullaris.
c) cauda equina.
d) filum terminale.

1. which of the following is correct regarding the occipital lobe?

a) it is concerned with voluntary motor functions.
b) it is the primary site for receiving and interpreting signals from the general senses.
c) it plays a role in determining sleep - wake rhythms.
d) it is the principal visual center of the brain.
e) it regulates food and water intake, as well as body temperature.

1. the pineal gland is part of which larger region of the brain?

a) thalamus
b) hypothalamus
c) epithalamus
d) medulla oblongata
e) occipital lobe

Explanation:

The autonomic nervous system is responsible for involuntary functions such as regulating gastrointestinal motility (A), adjusting heart rate and force (B), altering salivary gland secretion (D), and changing the diameter of the pupil (C). Contracting the muscles of the back to maintain posture (B) is a voluntary function controlled by the somatic nervous system, not the autonomic nervous system.

Answer:

B. contracting the muscles of the back to maintain posture