The Excitatory Signal Generated by the Cardiac Pacemaker Spreads from Fiber

question 54

Multiple Choice

The excitatory signal generated by the cardiac pacemaker spreads from fiber to fiber via

• A) gap junctions.
• B) tight junctions.
• C) gated channels.
• D) desmosomes.
• E) sodium-potassium channels.

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Definitions:

Throwing Rocks

The act of physically propelling stones or small boulders, often used in contexts of play, aggression, or protest.

Nurturing

Providing support, care, and encouragement to help someone grow, develop, or succeed.

Cold and Distant

Describing someone as cold and distant means they are emotionally unresponsive, unfriendly, and tend to keep others at a distance.

Punishment

The process by which a behavior is weakened, decreasing the likelihood of repetition.