In utero, which hormone stimulates the development of Wolffian ducts?
estradiol
DHT
FSH
testosterone
Correct Answer :
D. testosterone
testosterone stimulates Wolffian ducts development into the seminal vesicles, epididymis, vas deferens, ampulla, and ejaculatory duct.
Related Questions
Which of the following contributes second to the seminal fluid by volume?
seminal vesicles
the prostate
testes
bulbourethral glands
Which of the following is NOT a sex accessory tissue?
the prostate gland
seminal vesicles
epididymi
bulbourethral glands
Where is the gene sex-determining region (SRY) located at?
long arm of X chromosome
long arm of Y chromosome
short arm of Y chromosome
short arm of X chromosome
Which part of the prostate prevents the seminal fluid from entering the bladder during ejaculation?
central zone
peripheral zone
preprostatic tissue
anterior fibromuscular stroma
Which statement is false concerning the epididymis?
each epididymis can be palpable at the postero-lateral surface of the testis
has 3 parts; head, body, and tail
new batches of sperms stay in the epididymis around 2 days for maturation
shares the same blood supply of the testis
What causes pure testicular feminization is:
over estrogen synthesis
defective end-organ androgen response
extra X chromosome (XXY)
failure of genital ridge regression
What is false concerning PSA molecule?
the free form of PSA exists in small proportions in the body, and found mainly in BPH and in the ejaculate
α1- anti chymotrypsin binds to 3 epitopes of the PSA molecule to form a complexed PSA
α2- macroglobulin binds to 5 epitopes of the PSA molecule to form a complexed PSA
the purified PSA molecule has a molecular weight of 90 kDa
What is the best initial therapy for hyponatremic dehydration?
administration of hypertonic saline
administration of crystalloid
administration of normal saline
administration of ringer lactate
How long post bilateral orchiectomy, will patients be functionally castrated?
immediately
after 2 hrs.
after 12 hrs.
after 24 hrs.
What class of antibiotics might cause vestibular and/or auditory impairment?
aminoglycosides
αantipseudomonal penicillins
cephalosporins
fluoroquinolones
Which of the following mediates calcium reabsorption in the distal renal tubules?
aldosterone
hypocalcemia
parathyroid hormone
vitamin D
What fascial layer(s) cover(s) the prostate?
Denonvilliers fascia
prostatic fascia
levator fascia
all of the above
How many renal papillae are there in a typical kidney?
4 to 6
7 to 9
10 to 12
13 to 14
Which lab results indicate poor prognosis of male infertility?
azoospermia; normal FSH; increase LH
azoospermia; decrease FSH; normal LH
oligospermia; increase FSH; normal LH
oligospermia; normal FSH; decrease LH
Regarding multicystic kidneys, at what age does the compensatory renal growth end?
at birth
2 years
at puberty
none of the above
What nerve provides the major neural supply to the striated urinary sphincter and levator ani muscle?
somatic innervations
sympathetic fibers from T11 - L2
the pudendal nerve
the obturator nerve
Which of the following conditions could result in white urine?
chyluria
bacteriuria
phosphaturia
all of the above
The mature genitourinary system develops from all of the following embryonic sources, EXCEPT:
intermediate mesoderm
mesothelium of celomic cavity
endoderm of the urogenital sinus
somatic ectoderm
Which antibiotic is the best to treat soft tissue infection with methicillin-resistant Staphylococcus aureus (MRSA) in hospitalized patients?
vancomycin
cefotaxime
penicillin G
tobramycin
Which nephron segment contains the most diluted urine in central diabetes insipidus patient?
proximal convoluted tubules
distal convoluted tubules
collecting duct
loop of Henle
Which statement is false concerning microhematuria?
malignancy is identified in patients presenting with microhematuria more than in patients presenting with gross hematuria
microscopic hematuria is defined as > 3 red blood cells per high powered field (RBC/hpf) on a single specimen
warrants full hematuria workup
history of cigarette smoking is of significance
In which condition can NOT creatinine level be 1200 mg/dL?
an aspirate of pelvic urinoma
in untreated end-stage renal failure disease
a sample from a wound drain after pyeloplasty
a sample from suprapubic catheter
Which of the following is NOT related to von Hippel-Lindau disease?
retinal hemangioblastoma
ureteral atresia
pheochromocytomas
multiple cysts in the pancreas and kidneys
What is false concerning coagulase splitting bacteria (Griess) test?
it is a reduction reaction that converts nitrate to nitrite
nitrazine reagent papers are used to elicit the reaction
it is false negative in diluted urine, on taking vitamin C, and in gram +ve bacteria
the reaction takes 4 minutes to complete
What is the approximated bladder capacity of an 8 yrs. girl?
150 ml
200 ml
250 ml
300 ml
What increases blood volume and pressure in corpora cavernosa during erection is:
increase in sympathetic discharge
contraction of ischiocavernosa and bulbocavernosa muscles
increase arterial flow and closure of emissary veins
shunting of blood from the dorsal to the central cavernosal artery
From where does the main parasympathetic efferent innervation to the pelvic plexus arise?
S1
S2-S4
T11-L2
L3-S1
In which organelle in Leydig cell does testosterone synthesis take place?
ribosome
mitochondria
Golgi apparatus
endoplasmic reticulum
What causes ureteral dilation during pregnancy is:
mechanical compression by the gravid uterus
physiological increase urine flow during pregnancy
elevated levels of progesterone
reflex inhibition of ureteral contractions
What is the creatinine clearance in ml/min for a 70 kg man aging 50 yrs. with 1.1 mg/dL serum creatinine?
79.54
44.19
84.15
94.25