In Cardiac Muscle

question 102

Multiple Choice

In cardiac muscle,

• A) calcium ions are not released from the sarcoplasmic reticulum.
• B) calcium ions do not bind to troponin molecules.
• C) calcium ions play no role in the process of contraction.
• D) about 20 percent of the calcium ion required for contraction comes from outside the cell.
• E) calcium ions play an important role in repolarizing the membrane after the depolarization phase.

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Definitions:

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An individual’s aim or desired outcome that they work towards through action or behavior, often reflecting personal values and aspirations.

Endorphins

Chemicals naturally produced by the body that alleviate pain and enhance sensations of pleasure and well-being.

Opiates

A group of drugs derived from opium used for their analgesic, narcotic, and sedative properties.

Barbiturates

A class of drugs that act as central nervous system depressants, used to treat anxiety, insomnia, and seizure disorders.