Action Potentials Move Along Axons

question 58

Multiple Choice

Action potentials move along axons

• A) more slowly in axons of large than in small diameter.
• B) by the direct action of acetylcholine on the axonal membrane.
• C) by activating the sodium-potassium "pump" at each point along the axonal membrane.
• D) more rapidly in myelinated than in non-myelinated axons.
• E) by reversing the concentration gradients for sodium and potassium ions.

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Definitions:

Pancreas

An endocrine gland, located below the stomach, that produces digestive juices and hormones.

Islet Cells

The part of the pancreas that produces glucagon and insulin.

Glucagon

A hormone produced by the pancreas that increases blood glucose levels, acting as a counterbalance to insulin.

Insulin

A hormone produced by the pancreas that regulates blood sugar levels by facilitating the uptake of glucose into tissues for energy.