The Activity of N2RB Gene Declines in Older Mice and Causes

question 10

Essay

The activity of N2RB gene declines in older mice and causes a decline in learning ability. Some have suggested that this is beneficial, because it means older mice cannot forage as efficiently as they once did, which frees up resources for the next generation. How is this hypothesis based on group selection?

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Definitions:

Cerebral Angiography

A medical imaging technique used to visualize the blood vessels in the brain, often used to diagnose and evaluate conditions like aneurysms and stenosis.

Ventral Rami

Branches of spinal nerves that innervate the anterior and lateral parts of the trunk and the limbs.

Sensory Neurons

Nerve cells that transmit sensory information (e.g., sight, sound, touch) from the peripheral body to the central nervous system.

Dorsal Rami

Branches of spinal nerves that innervate muscles and skin of the back.