Question

match the terms in column a with the descriptions in column b. place the letter of your choice in the space provided.
column a
a. central sulcus
b. cerebral cortex
c. corpus callosum
d. falx cerebelli
e. gyrus (convolution)
f. hypothalamus
g. insula
h. medulla oblongata
i. midbrain
j. optic chiasma
k. pineal gland
l. pons
column b

1. structure formed by the crossing - over of the optic nerves
2. part of diencephalon that forms lower walls and floor of third ventricle
3. cone - shaped gland attached to upper posterior portion of diencephalon
4. connects cerebral hemispheres
5. ridge on surface of cerebrum
6. separates frontal and parietal lobes
7. part of brainstem between diencephalon and pons
8. rounded bulge on underside of brainstem
9. part of brainstem continuous with the spinal cord
10. layer of dura mater that separates cerebellar hemispheres
11. cerebral lobe located deep within lateral sulcus
12. thin layer of gray matter on surface of cerebrum

Explanation:

• Central sulcus: It is a well - known landmark in the brain that separates the frontal and parietal lobes.
• Cerebral cortex: Composed of a thin layer of gray matter on the surface of the cerebrum, which is crucial for higher - order brain functions.
• Corpus callosum: A large bundle of nerve fibers that connects the two cerebral hemispheres, allowing for communication between them.
• Falx cerebelli: A layer of the dura mater (the outermost meningeal layer) that separates the cerebellar hemispheres.
• Gyrus (convolution): These are the ridges on the surface of the cerebrum. The convolutions increase the surface area of the cerebral cortex.
• Hypothalamus: Part of the diencephalon, it forms the lower walls and floor of the third ventricle and is involved in many homeostatic functions.
• Insula: A cerebral lobe that is located deep within the lateral sulcus.
• Medulla oblongata: Part of the brainstem that is continuous with the spinal cord and is involved in many vital functions like regulating heart rate and breathing.
• Midbrain: Part of the brainstem between the diencephalon and pons. It is involved in visual and auditory processing and motor control.
• Optic chiasma: The structure formed by the crossing - over of the optic nerves. This crossing is important for the visual pathway.
• Pineal gland: A cone - shaped gland attached to the upper posterior portion of the diencephalon. It is involved in the regulation of circadian rhythms.
• Pons: A rounded bulge on the underside of the brainstem. It is involved in sleep, respiration, and communication between different parts of the brain.

Answer:

a. 6, b. 12, c. 4, d. 10, e. 5, f. 2, g. 11, h. 9, i. 7, j. 1, k. 3, l. 8