When Is the First Sound of the Heartbeat Produced

question 142

Multiple Choice

When is the first sound of the heartbeat produced?

• A)Beginning of atrial systole
• B)Beginning of atrial diastole
• C)Beginning of ventricular systole
• D)Beginning of ventricular diastole

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Definitions:

Norepinephrine

A neurotransmitter and hormone involved in the body’s fight-or-flight response, affecting attention and responding actions.

Depressed Mood

A state of persistent sadness, a key symptom of depression that can affect a person's thoughts, behavior, feelings, and sense of well-being.

Neurotransmitter

Chemical substances in the nervous system that transmit signals across a synapse from one neuron to another.

Antagonist

A substance that blocks or inhibits the effects of a neurotransmitter or hormone.