ATI LPN
NCLEX Cardiovascular Questions Quizlet Questions
Question 1 of 5
Compared to tissue fluid, the osmotic pressure of blood is typically_____; thus water moves into the _____.
Correct Answer: A
Rationale: Blood typically has a higher osmotic pressure than tissue fluid, causing water to move into the capillaries and helping maintain blood volume.
Question 2 of 5
Which layer of the heart wall consists of mesothelium and connective tissue?
Correct Answer: A
Rationale: The epicardium (visceral pericardium) consists of mesothelium and connective tissue.
Question 3 of 5
Which structure in the heart initiates action potentials that stimulate contraction of the heart at constant rate of about 100 beats per minute?
Correct Answer: D
Rationale: The sinoatrial (SA) node is the natural pacemaker of the heart, generating rhythmic action potentials that set the heart rate under normal conditions.
Question 4 of 5
The tunica intima of arteries provides a smooth lining with semilunar valves to ensure one-way flow.
Correct Answer: B
Rationale: The tunica intima is a smooth lining, but semilunar valves are in the heart (aortic/pulmonary), not arteries.
Question 5 of 5
Which of the following is not an atrioventricular valve?
Correct Answer: A
Rationale: The aortic valve is a semilunar valve, not an AV valve like mitral, bicuspid, or tricuspid.