Question

question 18
1 pts
the brain has ____ major divisions.
three
five
six
eight
question 19
1 pts
the pyramids are formed in the:
pons.
medulla.
midbrain.
cerebellum.
question 20
1 pts
the spinal ganglion can be found on the _____ of the spinal nerve.
dorsal nerve root
dorsal ramus
ventral nerve root
ventral ramus

Explanation:

• Question 18: The brain has three major divisions: the forebrain (prosencephalon), midbrain (mesencephalon), and hindbrain (rhombencephalon).
• Question 19: The pyramids are formed in the medulla oblongata. They are bundles of corticospinal and corticobulbar fibers.
• Question 20: The spinal ganglion (dorsal root ganglion) can be found on the dorsal nerve root. It contains the cell bodies of sensory neurons.

Answer:

• Question 18: three
• Question 19: medulla
• Question 20: dorsal nerve root