Which of the Following Observations Is an Example of a Positive

question 66

Multiple Choice

Which of the following observations is an example of a positive correlation?

• A)When teenage girls increase their intake of iron-rich foods,the percentage of the girls who have iron deficiency decreases.
• B)When a group of 6-year-old children increase their physical activity level to 60 minutes a day,the children's muscle mass increases.
• C)When a population consumes more fruits and vegetables,the percentage of people in that population with scurvy decreases.
• D)When older adults increase their daily intake of vitamin D,the percentage of the adults that develops infections decreases.

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Definitions:

SA Node

The sinoatrial node, a group of cells in the right atrium of the heart that regulates the heart's electrical rhythm.

AV Node

The atrioventricular node, a component of the heart's electrical system responsible for delaying the transmission of electrical impulses from the atria to the ventricles.

Chronic Obstructive

Referring to chronic obstructive pulmonary disease (COPD), a long-term lung disease characterized by a persistent obstruction of airflow from the lungs.

Nasal Cannula

A medical device used to deliver supplemental oxygen or airflow to a patient needing respiratory help, consisting of a lightweight tube placed under the nostrils.