ATI LPN
ATI The Medical Surgical Endocrine Test Questions
Question 1 of 5
The role of slow calcium channels in the cardiac contractile cell action potential is:
Correct Answer: D
Rationale: Slow Ca2+ channels prolong depolarization (plateau), enhancing contraction time.
Question 2 of 5
Each of the following is true regarding the spleen, except:
Correct Answer: C
Rationale: Spleen filters blood, not lymph; it's a secondary lymphoid organ.
Question 3 of 5
The pulmonary ventilation rate for someone with tidal volume of 500 mL and a respiration rate of 14 bpm is:
Correct Answer: C
Rationale: Ventilation = TV × RR = 0.5 L × 14 = 7 L/min.
Question 4 of 5
The kidney does all of the following when the pH of the extracellular fluid drops, EXCEPT:
Correct Answer: B
Rationale: In acidosis, kidneys excrete H+ and reabsorb HCO3-, not excrete less HCO3-.
Question 5 of 5
An increased incidence of peptic ulceration is found in rheumatoid arthritis
Correct Answer: A
Rationale: Rheumatoid arthritis patients have an increased risk of peptic ulcers, often due to chronic NSAID use, which impairs mucosal protection.