Which of the following isare involved in determini

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ATI RN Test Bank

Which of the following is/are involved in determining a person's total blood volume?

A. Age B. Body type C. Sex D. All of the above

Correct Answer: D

Rationale: Blood volume (~5L) varies with age, body size, and sex (D), averaging 70 ml/kg.

A hematocrit value of 42% would be:

A. the average for a man B. the average for a woman C. below average for a man D. below average for a woman

Correct Answer: B

Rationale: 42% (B) is average for women (~38-46%); men average ~45% (40-50%).

Granulocytes that protect against infections caused by parasitic worms

A. Neutrophils B. Eosinophils C. Basophils D. Lymphocytes

Correct Answer: B

Rationale: Eosinophils (B) target parasites with toxic granules.

Substance that hydrolyzes fibrin strands and dissolves blood clots

A. Thrombin B. Fibrinogen C. Plasmin D. Heparin

Correct Answer: C

Rationale: Plasmin (C) degrades fibrin, dissolving clots.

Which are the most numerous white blood cells?

A. lymphocytes B. neutrophils C. monocytes D. basophils

Correct Answer: B

Rationale: Neutrophils (B) are 60-70% of WBCs.

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