ATI RN
NCLEX Practice Questions Cardiovascular System Questions
Question 1 of 5
Substance needed by the liver to make prothrombin
Correct Answer: A
Rationale: Vitamin K (A) is essential for liver synthesis of prothrombin.
Question 2 of 5
One of the following is not a formed element found in blood.
Correct Answer: D
Rationale: Plasma (D) is liquid, not a formed element.
Question 3 of 5
Net filtration pressure is calculated by
Correct Answer: D
Rationale: Net filtration pressure = capillary hydrostatic pressure (pushing out) - blood colloid osmotic pressure (pulling in) (D). Other options (A, B, C) misrepresent Starling forces.
Question 4 of 5
Which of the following lists the valves in the order through which the blood flows from the vena cava through the heart?
Correct Answer: A
Rationale: Blood flows: vena cava → right atrium → tricuspid (A) → right ventricle → pulmonary semilunar → lungs → left atrium → bicuspid (mitral) → left ventricle → aortic semilunar.
Question 5 of 5
The cardiovascular centers are located in which area of the brain?
Correct Answer: A
Rationale: The medulla oblongata (A) houses cardiovascular centers regulating heart rate and BP.