Demyelinization

 

Question: 13 of 47

CORRECT

• Time Remaining: 08:03:55

Demyelinization results in which of the following?

Inhibited detection of a stimulus at the dendrites of a nerve cell

The myelin sheath does not directly affect the reception of a stimulus at the dendrites.

Disrupted propagation of an action potential along the axon of a nerve cell

MY ANSWER

The myelin sheath, which is a lipid-based structure, insulates the axon, allowing rapid electrical conduction of the action potential down the axon. Deterioration of the myelin sheath disrupts this process.

Inhibited uptake of neurotransmitters at the synapse of a nerve cell

The myelin sheath covers the axon and does not function in the reabsorption of neurotransmitters.

Disrupted ability of the Na+/K+ pumps to depolarize a cell

Na+/K+ pumps still function even if the myelin sheath has deteriorated.