ATI RN
100 Questions on the Cardiovascular System Questions
Question 1 of 5
The volume of blood pumped out of a ventricle by each heartbeat
Correct Answer: C
Rationale: Stroke volume (C) is the blood volume per beat (~70 ml). Cardiac output (A) is per minute, heart rate (B) is beats, afterload (D) is resistance.
Question 2 of 5
Which of the following precursor cells eventually give rise to the platelets?
Correct Answer: A
Rationale: Megakaryoblasts (A) fragment into platelets. Others form RBCs (B), granulocytes (C), or lymphocytes (D).
Question 3 of 5
Which mature cell has no nucleus, mitochondria, or ribosomes?
Correct Answer: A
Rationale: Erythrocytes (A) lack organelles for oxygen transport efficiency.
Question 4 of 5
The type of plasma protein that constitutes more than half of the total amount is:
Correct Answer: C
Rationale: Albumin (C) is ~55% of plasma proteins.
Question 5 of 5
If you give a 'unit' of blood in a blood drive and you are an average-sized adult, you have given about what percent of your blood?
Correct Answer: C
Rationale: A unit (~500 ml) is ~10% (C) of 5L total blood volume.