A Nursing Student Asks a Nurse How Beta Blockers Increase

question 11

Multiple Choice

A nursing student asks a nurse how beta blockers increase the oxygen supply to the heart in the treatment of anginal pain. The nurse tells the student that beta blockers:

• A) dilate arterioles to improve myocardial circulation.
• B) improve cardiac contractility, which makes the heart more efficient.
• C) increase arterial pressure to improve cardiac afterload.
• D) increase the time the heart is in diastole.

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Definitions:

Binomial

A statistical distribution that represents the number of successes in a fixed number of trials, with each trial having two possible outcomes.

Population Proportions

The percentage or fraction of individuals in a population that exhibit a particular attribute or characteristic.

Null Hypothesis

A hypothesis in statistical testing that there is no effect or no difference, and any observed deviation is due to sampling or experimental error.

Significance Level

A threshold below which a p-value is considered statistically significant, indicating that observed results are unlikely to be due to chance.