ATI LPN
ATI Quiz Medical Surgical Endocrine Questions
Question 1 of 5
At the skeletal muscle sarcomere, Ca2+ ions do each of the following, except:
Correct Answer: D
Rationale: Ca2+ binds troponin, exposes actin sites, is stored in SR; ATP hydrolysis is by myosin ATPase, not Ca2+.
Question 2 of 5
Type O blood has antibodies to which of the following in the blood plasma?
Correct Answer: C
Rationale: Type O has anti-A and anti-B, as it lacks A/B antigens.
Question 3 of 5
The classic pathway of complement activation begins when the protein C1 binds to:
Correct Answer: C
Rationale: C1 binds antigen-antibody complexes, initiating classic complement.
Question 4 of 5
During hyperpnea:
Correct Answer: D
Rationale: Hyperpnea (deep breathing) requires active inspiration (diaphragm, external intercostals) and expiration (internal intercostals, abdominals).
Question 5 of 5
Which of the following is a respiratory response to acidosis?
Correct Answer: D
Rationale: Increased respiration removes CO2, raising pH in acidosis.