What is the nature of the prostate-specific antigen?
protease
lyase
carboxylase
hydrolase
Correct Answer :
A. protease
PSA is a serine protease.
Related Questions
What is the earliest clinical sign of puberty in boys?
hoarseness of voice
enlargement of testes
appearance of axillary hair
change in body odor
In utero, which hormone stimulates the development of Wolffian ducts?
estradiol
DHT
FSH
testosterone
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 nerve supply of the adrenal gland?
sympathetic to the medulla
parasympathetic to the medulla
sympathetic to the cortex
parasympathetic to the cortex
Which type of renal stone crystals is known as coffin lid?
oxalate
struvite
urate
cystine
Which statement is false concerning smegma?
it is the white secretion produced under the foreskin in males
it has a crucial role in penile cancer development
it contains lysozymes, chymotrypsin, neutrophil elastase and cytokines
female smegma can be found between the labia
Which of the following is NOT a component of the normal semen?
zinc
fructose
prostate-specific antigen
alkaline phosphatase
In which body tissue(s) are creatine and phosphocreatine converted to creatinine?
bone marrow
skeletal muscles
brown fat
liver
What degrades semenogelin and determines the consistency of the seminal coagulum is:
spermine
acid phosphatase
PSA
semenoglobulin
Between which 2 fascial planes does the prostatic neurovascular bundle travel?
prostatic fascia and levator fascia
prostate capsule and prostatic fascia
Denonvilliers fascia and prostate capsule
Denonvilliers fascia and endopelvic fascia
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
What helps in treating Candida albicans cystitis is:
sodium bicarbonate
phyto soya
ascorbic acid
sol palmetto
What is the best method to evaluate calcium levels in the urine?
from early morning urine sample
comparing urine and serum calcium at a given time
performing 24 urine collection
from a mid-stream urine sample
Which artery(ies) supply(ies) the prostate?
middle rectal
inferior vesical
a & b
none of the above
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
Which class of the following diuretics could cause erectile dysfunction?
loop diuretics
thiazide diuretics
potassium sparing diuretics
osmotic diuretics
Which α- adrenergic receptor subtype mediates smooth muscle contraction of the prostate?
α1-A
α2-A
α1-B
α2-B
Which of the following is false regarding zona glomeruloza?
the most superficial layer of the adrenal cortex
responses to increased potassium levels, renin or decreased renal blood flow
it causes pheochromocytoma
secretes aldosterone
The commonest neoplasms that metastasize to kidneys come from:
breasts
thyroids
lungs
liver
What is false concerning renal vasculature?
there are 4 surgical segments of the kidney, based on the segmental artery distribution
along the kidney convexity, there is an avascular plane
there are no collaterals between segmental arteries
in < 10%, the posterior branch is the first to branch off the renal artery
Bacterial resistance to antibiotics may occur because of:
inherited chromosomal-mediated resistance
acquired chromosomal-mediated resistance
extrachromosomal-mediated resistance
all of the above
What causes pink diaper syndrome is (are):
Staphylococcus epidermidis in the urine
dried urate crystals on the diaper
Adenovirus 11 in the urine
Candidiasis in the urine
Which of the following is NOT a cause of hypocitraturia?
high protein diet
hypokalaemia
proximal renal tubular acidosis
idiopathic
What does make UTI more common in mid-aged females than in males?
short female urethra
pregnancy
vaginal colonization with enterobacteria
all the above
Which part of the prostate prevents the seminal fluid from entering the bladder during ejaculation?
central zone
peripheral zone
preprostatic tissue
anterior fibromuscular stroma
The epithelial component of the prostate consists of all of the following, EXCEPT:
basal cells
intermediate cells
tubulo-columnar cells
neuroendocrine cells
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
Sturge-Webber syndrome
Which of the following diabetes mellitus treatments causes erectile dysfunction?
long-acting insulin
metformin
sulfonylurea
none of the above
Which innervations mediate detumescence?
cavernous nerves
dorsal nerves of the penis
sympathetic nervous system
parasympathetic nervous system
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