Which innervations mediate detumescence?
cavernous nerves
dorsal nerves of the penis
sympathetic nervous system
parasympathetic nervous system
Correct Answer :
C. sympathetic nervous system
detumescence happens because of sympathetic discharge to the cavernous smooth muscles.
Related Questions
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 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 is the most significant innervation of the vas deferens?
sympathetic nervous system
parasympathetic nervous system
somatic nervous system
none of the above
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 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
Which α- adrenergic receptor subtype mediates smooth muscle contraction of the prostate?
α1-A
α2-A
α1-B
α2-B
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
Renal blood flow is autoregulated by:
sympathetic nervous system
parasympathetic nervous system
urinary output
afferent arteriolar resistance
How many days does spermatogenesis take in the man?
16
32
64
90
Where do Cowper`s gland ducts drain into?
ejaculatory ducts
prostatic urethra
membranous urethra
bulbous urethra
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
What do the specialized cells, at the juxtaglomerular apparatus, produce?
erythropoietin
renin
angiotensin I
angiotensinogen
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 diabetes mellitus treatments causes erectile dysfunction?
long-acting insulin
metformin
sulfonylurea
none of the above
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 layer lies between the superficial and deep inguinal lymph nodes?
Scarpa`s fascia
fascia lata
Dartos fascia
Camper`s fascia
Which area in the nervous system is tested by bulbocavernosus reflex?
brain stem
C2 C4
S2 - S4
L2 - L4
What is the earliest clinical sign of puberty in boys?
hoarseness of voice
enlargement of testes
appearance of axillary hair
change in body odor
Which of the prostate medications could result in retrograde ejaculation?
tamsulosin
doxazosin
dutasteride
alfuzosin
Which of the following does NOT increase in prostate cancer?
human kallikrein 2
pro-PSA
free PSA
complexed PSA
What fascial layer(s) cover(s) the prostate?
Denonvilliers fascia
prostatic fascia
levator fascia
all of the above
Which antibiotic is the best to treat soft tissue infection with methicillin-resistant Staphylococcus aureus (MRSA) in hospitalized patients?
vancomycin
cefotaxime
penicillin G
tobramycin
The manifestations of autonomic dysreflexia include:
hypotension and tachycardia
hypotension and bradycardia
hypertension and tachycardia
hypertension and bradycardia
Which zone of the prostate originates from the Wolffian duct tissue:
central zone
peripheral zone
transitional zone
periurethral glands
What class of antibiotics might cause vestibular and/or auditory impairment?
aminoglycosides
αantipseudomonal penicillins
cephalosporins
fluoroquinolones
All of the following develop from the mesonephric ducts, EXCEPT:
vas deferens
seminal vesicles
appendix epididymis
appendix testis
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
Which type of renal stone crystals is known as coffin lid?
oxalate
struvite
urate
cystine
What is false about indinavir sulfate stones?
intratubular crystal formation might occur
CT cannot reliably confirm the presence of indinavir calculi
stone formation is demonstrated in 80% of patients taking the medication
is a protease inhibitor with poor solubility and significant urinary excretion
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