The Heart Has to Be Able to Regulate Its Contractions

question 63

Multiple Choice

The heart has to be able to regulate its contractions. Heart muscle, unlike skeletal muscle, cannot go into a tetanus. This is because

• A) the heart muscle has to be able to consistently contract and pump blood in a controlled fashion.
• B) heart muscle is not resistant to fatigue.
• C) heart muscle contracts faster than skeletal muscle.
• D) heart muscle cannot use glycogen.
• E) the heart uses aerobic metabolism.

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Definitions:

Ativan

A prescription medication known generically as lorazepam, used to treat anxiety disorders, insomnia, and certain types of seizures.

Antipsychotic Drugs

Medications used to treat symptoms of psychosis, including delusions and hallucinations, primarily in mental health conditions.

Dopamine

A type of neurotransmitter in the brain that plays a key role in controlling the reward and pleasure centers, as well as regulating movement and emotional responses.

Receptor Sites

Specific locations on the surface of a cell or neuron where neurotransmitters, hormones, or drugs can bind and elicit a biological response.