SCI 220 Week 8 Quiz | Full Questions and Answers | 2026 Update | 100% Correct - Nightingale College.

SCI 220 Week 8 Quiz | Full Questions and Answers | 2026 Update | 100%
Correct - Nightingale College.

Question 1

The phrenic nerve is found in the _____ plexus.

 A. Cervical ✅
 B. Brachial
 C. Lumbar
 D. Sacral

Answer: A. Cervical



Question 2

Which of the following is not true of the lateral corticospinal tract fibers?

 A. Most decussate.
 B. Most inhibit the lower motor neuron. ✅
 C. They are referred to as pyramidal pathways.
 D. They originate in the cerebral cortex.

Answer: B. Most inhibit the lower motor neuron.



Question 3

The brain has _____ major divisions.

 A. Three
 B. Five
 C. Six ✅
 D. Eight

Answer: C. Six



Question 4

Spinal nerves are _____ fibers.

,  A. Only sensory
 B. Only motor
 C. Completely autonomic
 D. Motor and sensory ✅

Answer: D. Motor and sensory



Question 5

All cell bodies of the autonomic nervous system are located within the CNS.

 A. True
 B. False ✅

Answer: B. False



Question 6

Beta receptors:

 A. Are cholinergic.
 B. Bind acetylcholine.
 C. Bind norepinephrine. ✅
 D. Bind the toxin muscarine.

Answer: C. Bind norepinephrine.



Question 7

Nerve fibers of the spinothalamic tract are:

 A. Sensory ✅
 B. Motor
 C. Descending
 D. None of the above

Answer: A. Sensory