Which of the Following Statements Is True Concerning the Diastolic

question 126

Multiple Choice

Which of the following statements is true concerning the diastolic depolarization phase of a cell in the SA node?

• A) The cell will not depolarize until it receives sympathetic stimulation.
• B) The pacemaker potential is caused by Ca²⁺ entering the cell via L-type Ca²⁺ channels.
• C) The pacemaker potential is slower in achieving threshold when acetylcholine is applied to the SA node cells.
• D) During diastolic depolarization, there is a gradually increasing permeability to K⁺.
• E) The slope of the diastolic depolarization is decreased when norepinephrine is applied to the SA node cells.

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Definitions:

Negatively Correlated

An association between two variables characterized by the increase of one variable leading to the decrease of the other, and reverse scenarios.

Variables

Elements, features, or factors that can change and have different values among subjects in a study or experiment.

Illusion

A distortion of the senses, revealing how the brain normally organizes and interprets sensory stimulation.

Uncontrollable Events

Situations or occurrences that individuals cannot influence or dictate, often leading to feelings of helplessness.