Question

question 76
0.25 pts
all cell bodies of the autonomic nervous system are located within the cns.
true
false
question 77
0.25 pts
some parasympathetic postganglionic neurons have their cell bodies in nuclei in the brainstem.
true
false
question 78
0.25 pts
the cervical plexus:
is found deep in the neck.
is formed by the ventral rami of the first four cervical nerves and part of c5.
includes the phrenic nerve.
all of the above are correct.

Explanation:

Question 76

The autonomic nervous system has preganglionic neuron cell bodies in the CNS, but postganglionic neuron cell bodies are in ganglia outside the CNS (e.g., sympathetic chain ganglia, parasympathetic ganglia). So not all cell bodies are in the CNS.

Parasympathetic postganglionic neurons have their cell bodies in ganglia (terminal or intramural ganglia) outside the CNS, not in brainstem nuclei. Preganglionic parasympathetic neurons have cell bodies in brainstem nuclei. So the statement is false.

• The cervical plexus is deep in the neck.
• It is formed by ventral rami of C1 - C4 (and part of C5).
• It includes the phrenic nerve (which innervates the diaphragm).

Thus, all the given statements about the cervical plexus are correct.

Answer:

False

Question 77