ATI LPN
Cardiovascular Exam Questions Quizlet 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 contract to pull on the chordae tendinae, preventing AV valve prolapse into the atria.
Question 2 of 5
If the diameter of a blood vessel decreases, then the resistance will_____, thus blood pressure will _____.
Correct Answer: C
Rationale: A decrease in blood vessel diameter increases resistance, which subsequently raises blood pressure according to Poiseuille's law.
Question 3 of 5
Identify the main vessels that deliver oxygen rich blood to the head.
Correct Answer: C
Rationale: The common carotid arteries deliver oxygenated blood to the head and neck.
Question 4 of 5
Identify the structure found in a fetus that allows blood to flow directly from the pulmonary trunk into the aorta.
Correct Answer: D
Rationale: In fetal circulation, the ductus arteriosus allows blood to bypass the non-functional fetal lungs by shunting blood from the pulmonary trunk directly into the aorta.
Question 5 of 5
The difference between a person's maximum cardiac output and resting cardiac output is called the
Correct Answer: D
Rationale: Cardiac reserve reflects the heart's ability to increase its output above resting levels during exercise or stress.