ATI RN
Cardiovascular System Practice Questions Questions
Question 1 of 5
Identify the true statement:
Correct Answer: B
Rationale: At the arteriolar end, high hydrostatic pressure pushes oxygen and nutrients out; at the venular end, lower pressure allows wastes to enter via diffusion and osmosis. Capillary density correlates positively with metabolism, and arrangements vary by tissue.
Question 2 of 5
Calcium ions are necessary for the formation of:
Correct Answer: C
Rationale: Calcium ions are essential in the clotting cascade, particularly for converting prothrombin to thrombin (via factor Xa). They also aid other steps but are not directly needed to form fibrinogen, thromboplastin, or prothrombin.
Question 3 of 5
IgE immunoglobulins are involved in:
Correct Answer: B
Rationale: IgE is primarily involved in allergic reactions and parasitic infections, binding to mast cells and basophils to release histamine. IgG protects newborns via placental transfer, IgA protects mucosal areas, and IgM fights bacteria.
Question 4 of 5
Which factor is not synthesized in hemophilia A?
Correct Answer: A
Rationale: Hemophilia A is a deficiency in factor VIII (antihemophilic factor), impairing the intrinsic pathway. Factor IX deficiency is hemophilia B, and VII and XII are unrelated to hemophilia A.
Question 5 of 5
A client recently had a pacemaker implanted and the nurse assistant notifies the nurse that the client called out complaining of dizziness. Which of the following is the first step that the nurse should take?
Correct Answer: D
Rationale: The nurse’s first step is to assess the client (D) by checking heart sounds and pulses, as dizziness may indicate pacemaker malfunction or hemodynamic instability. Assessment precedes diagnostic tests like EKG (B) or interrogation (A), and calling the provider (C) comes after initial data collection. (Source: Document, p. 4-5)