ATI RN
Cardiovascular System Test Questions Questions
Question 1 of 5
What structures in the heart wall prevent the AV (atrioventricular) valves from opening up into the atria?
Correct Answer: A
Rationale: Papillary muscles (A) contract to pull chordae tendineae, preventing AV valves from inverting into atria during ventricular systole. Auricles (B) are atrial structures, the septum (C) separates ventricles, and endocardium (D) is a lining.
Question 2 of 5
Contraction of skeletal muscles will ___ venous return, thus ___ stroke volume.
Correct Answer: C
Rationale: Skeletal muscle contraction (muscle pump) compresses veins, increasing venous return (C), which increases preload and stroke volume per Frank-Starling’s law. A, B, D mismatch effects.
Question 3 of 5
Inflammation of veins, called ___ is a serious condition because a thromboembolism may occur.
Correct Answer: A
Rationale: Phlebitis (A) is vein inflammation, risking thromboembolism (clot dislodgement). Varicose veins (B) and hemorrhoids (C) are vein conditions, pulmonary embolism (D) is a result, not the condition.
Question 4 of 5
Identify the hormone(s) that will decrease blood volume and thus blood pressure.
Correct Answer: C
Rationale: ANH (C) decreases blood volume and BP by promoting sodium/water loss and vasodilation. ADH and aldosterone (A, B, D) increase volume.
Question 5 of 5
What vessels drain oxygen poor blood from the brain, head, and neck?
Correct Answer: A
Rationale: Jugular veins (A) drain deoxygenated blood from the brain, head, and neck. Subclavian veins (B) drain arms, carotid (C) and brachiocephalic (D) are arteries.