ATI RN
Cardiovascular System Assessment Questions Questions
Question 1 of 5
The following four components of the blood are necessary for clotting:
Correct Answer: C
Rationale: Blood clotting requires calcium (cofactor), prothrombin (converted to thrombin), fibrinogen (forms fibrin), and platelets (form the plug and release clotting factors). Heparin inhibits clotting, and albumin/globulin/vitamin A are not directly involved.
Question 2 of 5
Hemostasis does not involve:
Correct Answer: D
Rationale: Hemostasis includes vasoconstriction (smooth muscle), platelet adhesion, and clot retraction. The renin-angiotensin system regulates blood pressure, not directly involved in hemostasis.
Question 3 of 5
On the heart, the impact of adrenaline is all of these except that
Correct Answer: C
Rationale: Adrenaline (epinephrine) increases heart rate (chronotropy), contraction force (inotropy), and oxygen demand via β-adrenergic stimulation. However, it increases myocardial irritability (risk of arrhythmias), not decreases it, making C the exception.
Question 4 of 5
The expression 'cardiac cycle' refers to:
Correct Answer: D
Rationale: The cardiac cycle is the sequence of mechanical and electrical events between one heartbeat and the next , including systole and diastole (~0.8s at 75 bpm). A is too broad, B is cardiac output, C is ECG-specific, and D is heart sound-specific, not the full cycle.
Question 5 of 5
The chamber that pumps oxygen rich blood to the body is the
Correct Answer: C
Rationale: The left ventricle (C) pumps oxygen-rich blood into the aorta for systemic circulation. The left atrium (A) fills the left ventricle, the right atrium (B) receives deoxygenated blood, and the right ventricle (D) pumps to the lungs.