What Is a Valid Reason for Lowering the Intensity of Exercise

question 49

Multiple Choice

What is a valid reason for lowering the intensity of exercise at higher altitudes?

• A)Exposure to higher altitudes causes a decrease in pulmonary ventilation and heart rate
• B)High altitudes cause a decrease in cardiac output at submaximal workloads
• C)High altitudes cause an increase in pulmonary ventilation, heart rate, and cardiac output at submaximal workloads
• D)The angina threshold is lower due to a 25% reduction in maximal oxygen consumption

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Definitions:

Lymphatic Tissue

Specialized tissue in the lymphatic system involved in immune responses.

Tongue

A muscular organ in the mouth of most vertebrates, involved in taste, swallowing, and speech.

Hepatic Lobules

The microscopic functional units of the liver, consisting of a hexagonal arrangement of liver cells (hepatocytes) centered around a central vein.

Macrophages

A type of phagocytic cell found in the liver, spleen, lungs, bone marrow, and connective tissue. Macrophages play several roles in humoral and cell-mediated immunity, including presenting the antigens to the lymphocytes involved in these defenses; also known as monocytes while in the bloodstream.