ATI RN
Cardiovascular System Questions Questions
Question 1 of 5
The amount of blood that flows out of a ventricle per unit of time
Correct Answer: B
Rationale: Cardiac output (B) is the total blood volume ejected from a ventricle per minute (stroke volume × heart rate). Stroke volume (A) is per beat, heart rate (C) is beats, afterload (D) is resistance.
Question 2 of 5
Which of the following types of proteins is present at the highest percentage in the blood component labeled I in the figure?
Correct Answer: B
Rationale: Albumin (B) is ~55% of plasma proteins (assuming I is plasma). Globulins (A) ~35%, fibrinogen (C) ~7%, thrombin (D) is an enzyme.
Question 3 of 5
Which of the following is/are involved in determining a person's total blood volume?
Correct Answer: D
Rationale: Blood volume (~5L) varies with age, body size, and sex (D), averaging 70 ml/kg.
Question 4 of 5
Which type of white blood cell plays a major role in immunity?
Correct Answer: C
Rationale: Lymphocytes (C) (T/B cells) are central to adaptive immunity.
Question 5 of 5
A hematocrit value of 42% would be:
Correct Answer: B
Rationale: 42% (B) is average for women (~38-46%); men average ~45% (40-50%).