Question

the image above is that of one hemisphere of a sheep brain which is very similar to that of a human brain. the pins are placed in 3 internal structures of the brain. which answer choice below is incorrect concerning these structures? a the red pin is placed in the thalamus. b the blue pin is placed in the cerebellum. c the medulla oblongata is not labeled with a pin. d the green pin is placed in the lateral ventricle.

Explanation:

To solve this, we analyze each option based on sheep brain anatomy:

• Option A: The red pin can be in the thalamus (correct, as thalamus is a deep structure).
• Option B: The blue pin is placed in the cerebrum (not cerebellum). The cerebellum is the folded structure at the back/bottom, while the blue pin is in the cerebral hemisphere (incorrect).
• Option C: The medulla oblongata (a brainstem structure) is not labeled by any pin (correct, as pins are in thalamus, cerebrum, and lateral ventricle).
• Option D: The green pin can be in the lateral ventricle (correct, as ventricles are fluid - filled spaces in the brain).

Answer:

B. The blue pin is placed in the cerebellum.