L5 - CNS (Blood Supply, Ventricles, and Spinal Cord)

Question 1

What do the vertebral arteries arise from?

Answer 1

The left and right subclavian arteries

Question 2

What do the vertebral arteries merge to become?

Answer 2

The basilar artery

Question 3

What do the common carotid arteries arise from and bifurcate to become?

Answer 3

The common carotid arteries arise from the brachiocephalic artery (right) and the aorta (left); they bifurcate to become the internal and external carotid arteries.

Question 4

What vascular structure unites the arterial blood supply within the brain from the common carotid arteries and the vertebral arteries?

Answer 4

The circle of Willis

Question 5

What cluster of capillaries lines the ventricles and is responsible for producing CSF?

Answer 5

The choroid plexus

Question 6

Name the brain ventricles from anterior to posterior.

Answer 6

Lateral ventricles –> Foramina of Monro –> Third ventricle –> Cerebral aquaduct –> Fourth ventricle –> Foramina of Luschka (lateral) and Magendie (medial)

Question 7

The spinal cord has three slits down its length. What are they?

Answer 7

The anterior median fissure, the central canal, and the posterior median sulcus

Question 8

What term refers to the sections of spinal cord gray matter; what term refers to the sections of spinal cord white matter?

Answer 8

Horns; funiculi

Question 9

How many sections make up the spinal cord gray matter? What are they called?

Answer 9

3; anterior (motor), lateral (motor), and posterior (sensory)

Question 10

How many funiculi sections make up the spinal cord white matter? What are they called?

Answer 10

3; anterior, lateral, and posterior

Question 11

What is the name of the sensory nerve cell bundles lining the spinal cord?

Answer 11

Dorsal root ganglia