In human males, testosterone is produced mainly by the
Anonymous Quiz
98%
Leydig cells
0%
Sertoli cells.
0%
Seminiferous tubules.
2%
Epididymis
Full development and function of the seminiferous tubules require
Anonymous Quiz
0%
Somatostatin
11%
LH.
2%
Oxytocin
86%
Androgens and FSH.
Which hormones are responsible for spermatogenesis from the next?
Anonymous Quiz
98%
FSH and testosterone
2%
LH and inhibin
0%
GnRH and Inhibin
0%
Prolactin and GH
A 28 year o old man presanted with infertility since one and half years. He is working as a bakery since 3 years. What is the most important investigation to start with?
Anonymous Quiz
3%
Transrectal ultrasound to assess the prostate
13%
Serum testosterone
80%
Semen analysis
5%
Serum LH and FSH
What is the normal sperm count in semen analysis?
Anonymous Quiz
12%
More than 200 millions/CC
47%
More than 100 millions/CC
40%
More than 50 millions/CC
2%
More than 20 millions/CC
Which of the following organa produces Testosterone?
Anonymous Quiz
0%
Adrenal glands
0%
Ovaries
21%
Testis
79%
All of the above
Which of the following produces Estradiol in the males?
Anonymous Quiz
52%
Sertoli cells
7%
Leydig cells
0%
Pituitary gland
40%
Adrenal gland
Which hormone influence/s the production Testosterone?
Anonymous Quiz
8%
Activin
3%
Inhibin
51%
Luteinizing Hormone
38%
All of the above
Which of the following substances influence/s the release or Increase of Follicle Stimulating Hormone production?
Anonymous Quiz
44%
Activin
0%
Inhibin
7%
Estrogen
49%
All of the above
Which hormone is the MOST potent/active form of Testosterone?
Anonymous Poll
2%
Androstenedione
17%
dehydroepiandrosterone
78%
Dihydrotesterone
2%
All of the above
Which of the following increases the levels of Sex Hormone Binding Globulin (SHBG) in the plasma?
Anonymous Quiz
10%
Growth hormone
48%
Estrogen
8%
Testosterone
35%
A , C only
What is/are the physiologic affect/s of Testosterone?
Anonymous Quiz
3%
Acceleration of epiphysial closure
3%
Penile & scrotal growth
0%
Growth of body hair
95%
All of the above
Which of the following is TRUE regarding regulation of testicular function?
Anonymous Quiz
3%
Low levels of testosterone suppresa anterior pituitary gonadotropins.
3%
Activin causes feedback suppression of both the pituitary and hypothalamus.
20%
FSH stimulates tastosterone synthesis by the Leydig culls.
74%
The hypothalamus-pituitary-testicular axis is sensitive during puberty.
What is the effect of Testosterone when given to the females?
Anonymous Quiz
0%
Clitoral enlargement
3%
Hirsutism
3%
Front baldness
95%
All of the above
The normal seminal ejaculate
Anonymous Quiz
0%
Has a volume of about 5-10 ml.
6%
Comes mainly from the seminiferous tubules and epididymis.
92%
Contains fructose from the seminal vesicles
3%
Its PH is acidic.
Removal of the testes in the adult causes
Anonymous Quiz
6%
A rise in the pitch of the voice
89%
Loss of libido, Hot flushes, irritability and depression
3%
Loss of the ability to copulate
3%
A fall in the blood levels of LH and FSH.
Secondary sexual characteristics do not develop in children
Anonymous Quiz
16%
Whose seminiferous tubules, but not interstitial cells, have been damaged by radiation.
13%
Suffering from severe malnutrition
6%
With undescended testis
66%
Lacking pituitary hormones.
Infertility in the male can be explained by observations that
Anonymous Quiz
61%
There are no motile sperms in seman 15 minutes after ejaculation.
15%
20% of the sperma in the semen are abnormal
18%
The sperm count is 10"/ml
6%
The sperm count is more than 50 milions/ml.