ATI RN
100 Questions on the Cardiovascular System PDF Questions
Question 1 of 5
Which of the following factors increases heart rate?
Correct Answer: C
Rationale: Anxiety and fear (C) increase heart rate via sympathetic activation. Pain (A) and cold (B) may slow it via vagal reflexes, grief (D) varies.
Question 2 of 5
The blood pressure when the ventricles are contracting
Correct Answer: B
Rationale: Systolic pressure (B) is the pressure during ventricular contraction (~120 mmHg). Diastolic (A) is relaxation, pulse (C) is the difference, mean (D) is average.
Question 3 of 5
Towards the end of erythropoiesis in the bone marrow, a red blood cell loses its nucleus and becomes a
Correct Answer: D
Rationale: Reticulocytes (D) are immature RBCs post-nucleus loss, entering circulation. Proerythroblasts (A) are early, megakaryocytes (B) form platelets, progenitors (C) are stem cells.
Question 4 of 5
Which of the following types of proteins is present at the lowest percentage of the blood component labeled I in the figure?
Correct Answer: C
Rationale: Fibrinogen (C) is ~7% of plasma proteins (assuming I is plasma), lowest among options. Albumin (B) is highest, globulins (A) mid-range, thrombin (D) is active, not stored.
Question 5 of 5
Blood volume per kilogram of body weight varies inversely with:
Correct Answer: B
Rationale: Blood volume/kg decreases with higher body fat (B), as fat is less vascularized.