What is the half-life of β-HCG?
5 7 days
24 36 hours
2 3 days
12 24 hours
Correct Answer :
B. 24 36 hours
beta-HCG half-life is 24 36 hrs.
Related Questions
What vessels are located in the prostate neurovascular bundle?
Watson plexus
capsular arteries and veins
inferior vesical and midrectal vessels
Santorini plexus
Which of the following does NOT affect serum creatinine?
gender
age
obstructing stone at left lower ureter
rhabdomyolysis
All of the following conditions are related to obesity syndrome, EXCEPT:
super fertility
increase aromatization reaction
increase resistance to circulating insulin
sleep apnea
What is the most common cause of hematuria in men over 60 yrs.?
kidney stones
glomerulonephritis
BPH
bladder cancer
On tracing the IVU dye down, in a dilated ureter, the dilation stops at a level then continues as a normal calibre ureter. What could the pathology be?
lower ureteral stricture
ureteral valve
modified Lich-Gregoire ureteral reimplantation
residual dilation of hydroureter
Which zone of the prostate originates from the Wolffian duct tissue:
central zone
peripheral zone
transitional zone
periurethral glands
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
At which condition is alpha-fetoprotein most frequently elevated?
infiltrating ductal carcinoma of the breast
seminoma
hepatocellular carcinoma
malignant melanoma
How can hyperuricosuria cause calcium oxalate calculi?
by increasing oxalate absorption
by heterogeneous nucleation
by inducing hyperoxaluria
by reducing urate crystals saturation
Which of the following does asymptomatic hematuria workup include?
cystoscopy
CT urography
urine cytology
all of the above
At which type of renal tubular acidosis (RTA), typically, potassium levels increase?
type 1
type 2
type 3
type 4
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
At which week of gestation do the primordial germ cells migrate to form the genital ridges?
third
fourth
fifth
seventh
Which statement explains the first event in the micturition reflex?
opening of internal bladder sphincter
fall in urethral pressure
rise in intravesical pressure
cessation of sphincter EMG activity
What are the first and second most common zones from where prostate cancers arise?
central then transitional
peripheral then transitional
peripheral then central
transitional then central
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 type of renal stone crystals is known as coffin lid?
oxalate
struvite
urate
cystine
Which of the following lab results indicates prerenal failure?
serum BUN : creatinine > 20
urine [Na] < 30 mEq/L
Na excretion fraction < 1
all of the above
Which area in the nervous system is tested by bulbocavernosus reflex?
brain stem
C2 C4
S2 - S4
L2 - L4
Which of the following might cause sterile pyuria?
renal tuberculosis
urinary tract stones
interstitial cystitis
all of the above
Which statement regarding post-obstructive diuresis (POD) is false?
urine production exceeding 200 ml/hr for 2 consecutive hours or producing greater than 3 L of urine in 24 hours is diagnostic of POD
pathologic POD can be exacerbated by excessive fluid replacement
the replacement fluid choice is ringer lactate
fluid resuscitation depends on the degree of dehydration
Regarding multicystic kidneys, at what age does the compensatory renal growth end?
at birth
2 years
at puberty
none of the above
Which of the following is NOT a part of the urogenital diaphragm structures?
perineal membrane
deep transverse perineal muscle
urethral sphincter
Camper`s fascia
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
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
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
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
The commonest neoplasms that metastasize to kidneys come from:
breasts
thyroids
lungs
liver
What is the prime effect of antidiuretic hormone on kidneys?
increase collecting duct permeability
increase medullary blood flow
decrease cortical blood flow
decrease potassium secretion
The epithelial component of the prostate consists of all of the following, EXCEPT:
basal cells
intermediate cells
tubulo-columnar cells
neuroendocrine cells