Ch. 13: Reticular Formation

Question 1

T/F: The reticular formation is in the thalamus.

Answer 1

False

Question 2

The reticular formation is made of:
A. A mixture of neurites and perikarya
B. Neurites only
C. Perikarya only

Answer 2

A. A mixture of neurites and perikarya

Question 3

What is the name of sensory nucleus in the medulla that mediates info to the swallowing center?
A. Nucleus ambiguus
B. Parasympathetic nucleus of X
C. Nucleus of spinal tract of V
D. Nucleus of the solitary tract

Answer 3

D. Nucleus of the solitary tract

Question 4

The motor nucleus that executes the swallowing reflex is the:
A. Nucleus of the solitary tract
B. Motor nucleus of XII
C. Nucleus ambiguus
D. Intermediolateral nucleus

Answer 4

C. Nucleus ambiguus

Question 5

Two descending tracts that originate from the reticular formation are the _____ and _____ tracts.

Answer 5

Pontine reticulospinal, medullary reticulospinal

Question 6

The reticular nucleus that projects its fibers to the spinal cord to inhibit pain signals is the:
A. Substantia nigra of the midbrain
B. Nucleus raphe magnus
C. Thalamus
D. Pontine nuclei

Answer 6

B. Nucleus raphe magnus

Question 7

T/F: The swallowing center in the reticular formation projects to the nucleus ambiguus to trigger the swallowing reflex.

Answer 7

True

Question 8

T/F: Chemotherapy sickness can be prevented by serotonin receptor antagonists that block serotonin receptors in the chemoreceptor trigger zone.

Answer 8

True

Question 9

The micturition center is located in the:
A. Midbrain reticular formation
B. Pontine reticular formation
C. Medullary reticular formation

Answer 9

B. Pontine reticular formation

Question 10

The pontine reticulospinal tract is:
A. Excitatory to the lower motor neurons for flexors, but inhibitory to extensors
B. Excitatory to the lower motor neurons for extensors, but inhibitory for flexors
C. Excitatory for both flexors and extensors

Answer 10

B. Excitatory to the lower motor neurons for extensors, but inhibitory for flexors

Question 11

The glossopharyngeal nerve mediates signals from the carotid body and carotid sinus to the central nucleus known as the _____ in the medulla.

Answer 11

Nucleus of the solitary tract

Question 12

What is the role of the ARAS in consciousness?
A. The ARAS is required for gaining but not maintaining consciousness.
B. The ARAS acts by exciting nonspecific thalamic nuclei, which in turn activate the entire cerebral cortex
C. The ARAS acts directly on the cerebellar cortex to maintain consciousness.
D. The ARAS acts on the medullary reticular formation, which activates ascending somesthetic tracts to maintain consciousness.

Answer 12

B. The ARAS acts by exciting nonspecific thalamic nuclei, which in turn activate the entire cerebral cortex

Question 13

Injury to the reticular formation may result in irreversible:
A. Paralysis
B. Loss of equilibrium
C. Coma
D. Areflexia

Answer 13

C. Coma

Question 14

The CTZ is located in the:
A. Carotid body
B. Carotid sinus
C. Basilar pons
D. Area postrema

Answer 14

D. Area postrema