Question

which of the following cranial nerves is involved in autonomic/homeostatic regulation of the heart?
a.) hypoglossal (xii)
b.) accessory (xi)
c.) trigeminal (v)
d.) vagus (x)

Explanation:

The vagus nerve (X) is part of the autonomic nervous system. It plays a crucial role in regulating heart rate (a homeostatic function). The hypoglossal (XII) is for tongue movement, the accessory (XI) for neck and shoulder muscles, and the trigeminal (V) for facial sensation and chewing.

Answer:

d. Vagus (X)