ATI LPN
Medical Surgical Endocrine ATI Questions
Question 1 of 5
Which of the following is a valve that contains 2 cusps and allows blood to flow into a ventricle?
Correct Answer: D
Rationale: Mitral (bicuspid) valve has 2 cusps, allows flow from left atrium to ventricle.
Question 2 of 5
Calculate the net filtration pressure (NFP) with a capillary hydrostatic pressure (CHP) of 20 mm Hg and a blood colloid oncotic pressure (BCOP) of 25 mm Hg. Then determine if filtration or reabsorption occurs.
Correct Answer: D
Rationale: NFP = CHP - BCOP = 20 - 25 = -5 mm Hg; negative NFP means reabsorption.
Question 3 of 5
Which of the following structures protects the lower respiratory system from food and fluid bolus during swallowing?
Correct Answer: B
Rationale: Epiglottis closes over glottis during swallowing to prevent aspiration.
Question 4 of 5
Which hormone plays a central role in determining the rate of sodium reabsorption and potassium secretion?
Correct Answer: B
Rationale: Aldosterone increases Na+ reabsorption and K+ secretion in distal nephron.
Question 5 of 5
Administration of a cholinergic agent produce a mild contraction of the esophagus in achalaisa
Correct Answer: A
Rationale: Cholinergic agents stimulate acetylcholine receptors, which can cause mild esophageal contraction in achalasia due to increased smooth muscle activity, though the lower esophageal sphincter remains dysfunctional.