In which organelle in Leydig cell does testosterone synthesis take place?
ribosome
mitochondria
Golgi apparatus
endoplasmic reticulum
Correct Answer :
D. endoplasmic reticulum
synthesis of testosterone begins as cholesterol in the mitochondria, and then the final organelle that makes up the testosterone molecule is endoplasmic reticulum.
Related Questions
The manifestations of autonomic dysreflexia include:
hypotension and tachycardia
hypotension and bradycardia
hypertension and tachycardia
hypertension and bradycardia
In utero, which hormone stimulates the development of Wolffian ducts?
estradiol
DHT
FSH
testosterone
What is the nerve supply of the adrenal gland?
sympathetic to the medulla
parasympathetic to the medulla
sympathetic to the cortex
parasympathetic to the cortex
To which group of lymph nodes do tumors at the anterior superior area of the bladder, first, drain?
hypogastric
internal iliac
external iliac
lateral sacral
What could render red urine workup, false positive for hematuria?
dehydration
myoglobinuria
high doses of vitamin C
all of the above
What do urine tests examine to detect hematuria?
catalase activity of erythrocytes
peroxidase activity of erythrocytes
lyase activity of erythrocytes
none of the above
Which of the following conditions could happen in chronic pancreatitis and malabsorption syndrome with steatorrhea?
hyperoxaluria
hypercalciuria
hyperuricosuria
hyperphosphateuria
What is false about purple urine bag syndrome?
occurs due to the interaction between the chemical components of the urine and polyvinyl chloride material in the urine bag
it is commonly symptomless
more common in female nursing home residents
commonly implicated bacteria are K. pneumoniae, P. mirabilis, E. coli
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
What is the most significant innervation of the vas deferens?
sympathetic nervous system
parasympathetic nervous system
somatic nervous system
none of the above
Which agent is most likely to cause hemorrhagic cystitis?
cisplatin
ifosfamide
phosphomycin
amphotericin B
What is the narrowest part of the ureter?
uretero-pelvic junction
uretero-vesical junction
where ureters cross the pelvic brim
where ureters cross the common iliac bifurcation
Which of the renal artery occlusive conditions, commonly, do NOT affect renal function?
intimal fibroplasia
medial fibroplasia
medial hyperplasia
serosal hyperplasia
What causes Cushing`s disease is:
bilateral adrenal hyperplasia
pituitary over secretion of ACTH
exogenous administration of glucocorticoids
immune-mediated disease
Serum testosterone should be measured:
at mid-day
at the hour of sleep
in the morning
late afternoon
Which statement is false concerning capacitation of spermatozoa?
occurs after acrosome reaction
entails removal of a glycoprotein layer
it is a biochemical event of sperm maturation
changes occur in the female genital tract
What is the number of bacteria per high-power field microscopy that matches colony counts of 100,000/mL?
100
50
10
5
Renal blood flow is autoregulated by:
sympathetic nervous system
parasympathetic nervous system
urinary output
afferent arteriolar resistance
In utero, which hormone stimulates the development of the prostate gland?
estradiol
DHT
FSH
testosterone
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 degrades semenogelin and determines the consistency of the seminal coagulum is:
spermine
acid phosphatase
PSA
semenoglobulin
Which of the following carries the greatest risk of HIV transmission to health care workers?
splash of patient`s blood to the eyes
splash of patient`s blood to the mouth
surgical suture needle stick
hollow bore needle stick
What is the half-life of β-HCG?
5 7 days
24 36 hours
2 3 days
12 24 hours
Which of the prostate medications could result in significant hypotension?
finasteride
prazosin
silodosin
vardenafil
Which antibiotic is the best to treat soft tissue infection with methicillin-resistant Staphylococcus aureus (MRSA) in hospitalized patients?
vancomycin
cefotaxime
penicillin G
tobramycin
Regarding multicystic kidneys, at what age does the compensatory renal growth end?
at birth
2 years
at puberty
none of the above
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
Which of the following process(es) is (are) reversible?
5α-reductase enzyme reduces testosterone to DHT
aromatase enzyme reduces testosterone to estrogen
PSA molecule binds to α1-antichymotrypsin and α2-macroglobulin
none of the above
Which innervations mediate detumescence?
cavernous nerves
dorsal nerves of the penis
sympathetic nervous system
parasympathetic nervous system
Which of the following is (are) direct branch(es) of the abdominal aorta?
median sacral artery
inferior phrenic arteries
gonadal arteries
all of the above