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

1. the ______ function(s) in visual reflexes and tracking, such as to look and follow the flight of a butterfly.

a) basal nuclei
b) interthalamic adhesion
c) superior colliculi
d) inferior colliculi

1. which of the following structures releases neurotransmitter in a terminal ganglion?

a) somatic motor fiber
b) preganglionic sympathetic fiber
c) postganglionic parasympathetic fiber
d) preganglionic parasympathetic fiber
e) postganglionic sympathetic fiber

1. what is the largest of the cranial nerves and the most important sensory nerve of the face?

a) hypoglossal nerve
b) trigeminal nerve
c) accessory nerve
d) abducens nerve
e) facial nerve

1. the motor pathway of the autonomic nervous system involves ______ neurons.

a) one
b) two
c) three
d) no
e) four

1. there are ______ pairs of spinal nerves.

a) 12
b) 24
c) 35
d) 31
e) 62

1. which one of the following is made up of primarily adrenergic fibers?

a) preganglionic neurons of the sympathetic division
b) postganglionic neurons of the sympathetic division
c) postganglionic neurons of the parasympathetic division
d) all motor fibers of the somatic motor system
e) preganglionic neurons of parasympathetic division

Explanation:

1. The autonomic nervous system controls involuntary functions. Contracting back muscles for posture is a somatic (voluntary) function.
2. In the spinal cord, funiculi are the large white - matter regions.
3. The conus medullaris is the tapered end of the spinal cord at L1.
4. The occipital lobe is the principal visual center.
5. The pineal gland is part of the epithalamus.
6. The superior colliculi function in visual reflexes and tracking.
7. Postganglionic parasympathetic fibers release neurotransmitter in a terminal ganglion.
8. The trigeminal nerve is the largest cranial nerve and important for facial sensation.
9. The autonomic nervous system motor pathway has two neurons (preganglionic and postganglionic).
10. There are 31 pairs of spinal nerves.
11. Postganglionic neurons of the sympathetic division are primarily adrenergic.

Answer:

1. B. contracting the muscles of the back to maintain posture
2. B. funiculi
3. B. conus medullaris
4. D. It is the principal visual center of the brain
5. C. Epithalamus
6. C. superior colliculi
7. C. Postganglionic parasympathetic fiber
8. B. Trigeminal nerve
9. B. two
10. D. 31
11. B. Postganglionic neurons of the sympathetic division