In Some Cells,an Afterpotential Occurs Because

question 103

Multiple Choice

In some cells,an afterpotential occurs because

• A)the sodium ions continue to enter the cell after depolarization is finished.
• B)there is prolonged,elevated permeability to potassium during repolarization.
• C)the sodium-potassium pump is actively exchanging ions across the membrane.
• D)the extracellular Na+ ion concentration is reduced.
• E)the permeability to sodium continues longer than necessary.

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Definitions:

Fibrous

Consisting of or characterized by fibers, often referring to a type of tissue in plants or the structure of certain muscle tissues in animals.

Haustoria

Specialized structures of parasitic plants or fungi that penetrate host tissues to extract water and nutrients.

Root Nodules

Structures formed on the roots of certain plants, such as legumes, that house nitrogen-fixing bacteria, aiding in the conversion of atmospheric nitrogen into a form the plant can use.

Bacteria

Single-celled microorganisms that can exist either as independent (free-living) entities or as parasites, and may cause disease or be beneficial, playing key roles in processes like fermentation and decomposition.