A Certain Drug Decreases Heart Rate by Blocking a Receptor

question 5

Multiple Choice

A certain drug decreases heart rate by blocking a receptor on cardiac pacemaker cells. This drug probably binds to ________ receptors.

• A) nicotinic cholinergic
• B) muscarinic cholinergic
• C) alpha-1 adrenergic
• D) alpha-2 adrenergic
• E) beta-1 adrenergic

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Definitions:

Selective Observation

The process of focusing attention on specific events or phenomena while ignoring others, which can lead to biased conclusions or skewed perceptions.

Contradictory Evidence

Information or data that directly opposes previously established facts or theories, raising questions about the accuracy or truth of the subject in question.

Cherished Beliefs

Cherished beliefs are deeply held convictions or values that individuals or communities regard as of paramount importance.

Participant Observation

Involves carefully observing people’s face-to-face interactions and actually participating in their lives over a long period, thus achieving a deep and sympathetic understanding of what motivates them to act in the way they do.