Which nephron segment contains the most diluted urine in central diabetes insipidus patient?
proximal convoluted tubules
distal convoluted tubules
collecting duct
loop of Henle
Correct Answer :
C. collecting duct
ADH works at the collecting ducts. Deficiency of the ADH as in diabetes insipidus results in diluted urine in collecting ducts.
Related Questions
At what month of intra-uterine life do testes descend into the scrotum with the aid of the intra-abdominal pressure and the gubernacula?
sixth
seventh
eighth
ninth
What does apoptosis mean?
programmed cell death
new vascular formation
uninhibited neural stimulation
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Which part of the male urethra is the narrowest?
the membranous
the bladder neck
the bulbous
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What antibiotic could result in red man syndrome?
vancomycin
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seminal vesicles
the prostate
testes
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ureteral atresia
vesicoureteral reflux
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ureteral duplication
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decreasing vaginal pH
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decreasing bacterial adherence
When should a 70 yrs. man with 40 ml prostate volume, and total PSA of 2.0 ng/ml, go for a prostate biopsy?
if PSA reading had exceeded 2.7 ng/ml over 12 months
if free PSA reading was less than 0.4 ng/ml
if total PSA reading was greater than 8 ng/ml
any of the above
Which statement concerning urine pH is false?
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renal stones form at the extremes of pH range
reliable only when measured by 24 hr. urine collection
ranges from 4 7
What is the most significant innervation of the vas deferens?
sympathetic nervous system
parasympathetic nervous system
somatic nervous system
none of the above
Which of the following hormones, primarily, controls spermatogenesis?
GnRH
testosterone
LH
FSH
All of the following conditions are related to obesity syndrome, EXCEPT:
super fertility
increase aromatization reaction
increase resistance to circulating insulin
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43 ml/hr of normal saline
78 ml/hr of ¼ normal saline
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The epithelial component of the prostate consists of all of the following, EXCEPT:
basal cells
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tubulo-columnar cells
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In utero, which hormone stimulates the development of the prostate gland?
estradiol
DHT
FSH
testosterone
Which statement is true about the female urethra?
harder to catheterize when compared to the male urethra
4 inch long
opens into the vestibule below the clitoris
gets wider at the post-menopausal age
What is the nature of the prostate-specific antigen?
protease
lyase
carboxylase
hydrolase
Which drug does NOT result in urinary retention?
terazosin, antihypertensive
benzodiazepines, psychotropic medicine
levodopa, anti-Parkinsonism medicine
brimonidine, glaucoma eye drops
Which of the following explains infertility in liver cirrhosis male patients?
decrease plasma estradiol levels
increase plasma testosterone-estradiol-binding globulin levels
suppression of suprarenal androgens
exaggerated pituitary response to feedback hormones
Which statement is false concerning the epididymis?
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7 to 9
10 to 12
13 to 14
Which group(s) of lymph nodes drain(s) the glans penis?
internal and external iliac
superficial inguinal
deep inguinal
superficial and deep inguinal
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Which of the following is NOT a side effect of hydrochlorothiazide?
hypercholesterolemia
hyperuricemia
hypoglycemia
hypercalcemia
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Watson plexus
capsular arteries and veins
inferior vesical and midrectal vessels
Santorini plexus
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α2- macroglobulin binds to 5 epitopes of the PSA molecule to form a complexed PSA
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clotting factor VIII deficiency
clotting factor IX deficiency
breech delivery
scrotal cavernous haemangioma
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vas deferens
seminal vesicles
appendix epididymis
appendix testis
Which disease is described best by the following manifestations: grand mal epilepsy, mental retardation, hypertension, angiomyolipoma, adenoma sebaceum, bilateral enlarged kidneys, and normal renal function?
autosomal dominant polycystic kidney disease
von Hippel-Lindau disease
tuberous sclerosis
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How many days does spermatogenesis take in the man?
16
32
64
90