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Nervous System Organization: CNS and PNS

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Nervous System Organization: CNS and PNS

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Questions and Answers

Which of the following veins provides an accessory route of drainage for the brain?

Superior ophthalmalic vein

Vertebral vein (correct)

Internal jugular vein

Pterygoid plexus

Which of the following meningeal layers is the thinnest?

Dura mater

Subarachnoid space

Pia mater (correct)

Arachnoid mater

Which of the following is NOT a part of the cerebrum?

Frontal lobe

Cerebellum (correct)

Parietal lobe

Occipital lobe

Which of the following is the function of the emissary veins?

To connect intracranial vessels with veins in the scalp (D) Signup and view all the answers

Which of the following is the space between the vertebral bone and the underlying spinal dura?

Epidural space (C) Signup and view all the answers

How many horns do each of the left and right ventricles of the brain have?

3 (D) Signup and view all the answers

What is the primary function of the Peripheral Nervous System (PNS)?

to connect the Central Nervous System (CNS) to peripheral targets (C) Signup and view all the answers

What is the main difference between white matter and gray matter in the Central Nervous System (CNS)?

White matter is composed of axons, while gray matter is composed of neurons and their supporting cells (B) Signup and view all the answers

What are the five bones that form the cranium, which encases the brain?

Frontal, Parietal, Occipital, Temporal, and Sphenoid (C) Signup and view all the answers

Where does the spinal cord approximately end?

At the level of the second lumbar vertebra (L2) (A) Signup and view all the answers

What are the two main arteries that supply blood to the brain?

Internal carotid artery and vertebral artery (B) Signup and view all the answers

What is the term for the bundle of nerve roots that extend from the lumbar and sacral vertebrae?

Cauda equina (A) Signup and view all the answers