ATI RN
Cardiovascular System Questions and Answers Questions
Question 1 of 5
The dicrotic notch on the aortic pressure curve is caused by:
Correct Answer: C
Rationale: The dicrotic notch (C) reflects aortic valve closure, causing a brief pressure dip. Pulmonary valve (A) is pulmonary, filling (B) is diastolic, contraction (D) is systolic.
Question 2 of 5
Isovolumetric contraction is the phase of the cardiac cycle in which
Correct Answer: D
Rationale: Isovolumetric contraction is when ventricular pressure rises but volume stays constant, as all valves are closed.
Question 3 of 5
Valve through which the right ventricle pumps blood
Correct Answer: B
Rationale: The right ventricle pumps blood through the pulmonary semilunar valve (B) into the pulmonary artery. Tricuspid (A) is inflow, aortic (C) and mitral (D) are left-sided.
Question 4 of 5
The hormone that increases water reabsorbed by the kidney
Correct Answer: B
Rationale: ADH (B) increases water reabsorption in the kidneys, raising blood volume. Aldosterone (A) affects sodium, ANP (C) reduces volume, epinephrine (D) is stress-related.
Question 5 of 5
Which of the following plasma proteins plays a role in blood clotting?
Correct Answer: C
Rationale: Fibrinogen (C) is key in clotting, forming fibrin. Albumin (A) and globulins (B) have other roles; prostaglandins (D) are signaling molecules.