Deck 33: Dissection of the Sheep Brain

Question 1

The corpora quadrigemina, cerebral peduncles, and cerebral aqueduct are all parts of the

A)midbrain.
B)diencephalon.
C)medulla oblongata.
D)thalamus.
E)pons.

Answer 1

A

Question 2

Which layer of the meninges is thick and opaque?

A)Arachnoid mater
B)Infundibulum
C)Dura mater
D)Mammillary body
E)Pia mater

Answer 2

C

Question 3

When looking at the ventral surface of the sheep brain, which of the following structures is the most anterior?

A)Oculomotor nerves
B)Optic chiasma
C)Mammillary body
D)Facial nerves
E)Olfactory bulbs

Answer 3

E

Question 4

The optic nerves extend posteriorly and medially from the eyes, and merge at the

A)optic chiasma.
B)infundibulum.
C)corpus callosum.
D)fornix.
E)cerebral peduncle.

Question 5

In a median section of a sheep brain, the thalamus lies ________ the midbrain.

A)superior
B)lateral
C)anterior
D)inferior
E)posterior

Question 6

When comparing relative sizes, human olfactory bulbs are larger than those of sheep.

Question 7

What is the function of the choroid plexuses?

A)They form a bridge between the cerebral hemispheres.
B)They are responsible for visual reflexes.
C)They are small nerve plexuses in the brain.
D)They produce cerebrospinal fluid.
E)They are responsible for auditory reflexes.

Question 8

Which portion of the brainstem continues directly into the spinal cord?

A)Medulla oblongata
B)Cerebral peduncle
C)Midbrain
D)Corpora quadrigemina
E)Pons

Question 9

When looking at a ventral view of the sheep brain, which of the cranial nerves can be seen emerging from the floor of the midbrain?

A)Trigeminal nerves
B)Oculomotor nerves
C)Facial nerves
D)Olfactory nerves
E)Vagus nerves

Question 10

Even though the human brain is larger than the sheep brain, the sheep brain has more gyri and sulci than the human brain.

Question 11

Which ventricles are separated by the septum pellucidum?

A)The lateral ventricles and the third ventricle
B)The 2 medial ventricles
C)The third ventricle and the fourth ventricle
D)The fourth ventricle and the fifth ventricle
E)The 2 lateral ventricles

Question 12

Which of the following structures separates the 2 cerebral hemispheres of the sheep brain?

A)Central sulcus
B)Coronal fissure
C)Lateral sulcus
D)Longitudinal fissure
E)Transverse fissure

Question 13

The brains of mammals have many common structural features.

Question 14

On a median section of a sheep brain, the hypothalamus lies ________ to the thalamus.

A)superior
B)posterior
C)inferior
D)lateral
E)anterior

Question 15

The corpus callosum is a transverse band of white matter that runs between the cerebral hemispheres.