ATI RN
Multiple Choice Questions On Urinary System Questions
Question 1 of 5
Concerning podocytes all of the followings are true EXCEPT:
Correct Answer: D
Rationale: Podocytes have processes, filaments, and form the filtration barrier not part of the juxtaglomerular apparatus (macula densa, JG cells). This distinguishes podocyte function, critical for filtration, contrasting with JGA regulation.
Question 2 of 5
The first line medical treatment for prevention of Cystine stones is
Correct Answer: C
Rationale: Increasing cystine solubility (e.g., via alkalinization, fluids) is first-line for cystine stones raises pH above 7, reducing precipitation. Acidification worsens solubility opposite effect. Lowering sodium aids calcium stones, not cystine irrelevant. Intestinal binding isn't a strategy cystine is renal. Solubility enhancement distinguishes cystine prevention, key to managing this genetic defect, unlike counterproductive, unrelated, or non-existent approaches.
Question 3 of 5
The most common genetic cause for male infertility is
Correct Answer: C
Rationale: 47 XXY (Klinefelter syndrome) is the most common genetic male infertility cause extra X disrupts spermatogenesis, causing azoospermia. 47 XYY (Jacob's) rarely affects fertility normal testes. 45 XO (Turner's) is female, not male irrelevant. 46 XY is normal male karyotype no infertility link. Klinefelter's chromosomal excess distinguishes it, critical for genetic infertility, unlike rare, female, or normal variants.
Question 4 of 5
The Substrate for NOS (Nitric Oxide Synthase)
Correct Answer: A
Rationale: L-Arginine is the substrate for NOS converted to nitric oxide (NO) and citrulline, key for vasodilation (e.g., erection). Citrulline is a product, not substrate resultant. Cyclic AMP/GMP are second messengers, not NOS inputs downstream. Arginine's conversion distinguishes it, critical for NO production, unlike products or signaling molecules.
Question 5 of 5
A 34 year male has road traffic accident. His vital signs are stable and there are no significant external injuries. CT scan revealed deep parenchymal lacerations in the right kidney. The next step is
Correct Answer: C
Rationale: Delayed imaging assesses pelvicalyceal integrity (e.g., urine leak) in stable deep lacerations guides conservative vs. intervention. Open repair risks unnecessary surgery stability favors watching. Embolization suits vascular injury, not parenchymal mismatch. Nephrectomy is extreme preservation priority. Delayed imaging distinguishes it, key to defining injury extent, unlike premature or radical steps.