ATI RN
Cardiovascular System Questions and Answers Quizlet Questions
Question 1 of 5
What wave of an ECG (EKG) represents depolarization of the atria?
Correct Answer: A
Rationale: The P wave (A) represents atrial depolarization. QRS (B) is ventricular depolarization, T wave (C) is ventricular repolarization, and PQ interval (D) is a time segment, not a wave.
Question 2 of 5
Identify the process that allows for the movement of fluid into the capillary at its venous end.
Correct Answer: D
Rationale: Osmosis (D) drives fluid into the capillary at the venous end, where oncotic pressure exceeds hydrostatic pressure, reabsorbing water. Filtration (C) occurs at the arterial end, A/B don’t fit.
Question 3 of 5
Which of the following would cause blood pressure to decrease?
Correct Answer: D
Rationale: Atrial natriuretic factor (ANF, D) decreases BP by promoting vasodilation and sodium/water excretion. A, B, C increase BP.
Question 4 of 5
Identify the main vessels that deliver oxygen rich blood to the head.
Correct Answer: C
Rationale: The common carotid arteries (C) deliver oxygen-rich blood to the head. Jugulars (A) and brachiocephalic (D) are veins, subclavian (B) supplies arms.
Question 5 of 5
Chordae tendinae is found in:
Correct Answer: D
Rationale: Chordae tendineae (D) are in the heart’s ventricles, anchoring AV valves to papillary muscles. Auricles (A) are atrial appendages, brain ventricles (B) are unrelated, and sinus venosus (C) is embryonic.