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.
If a young woman has high plasma levels of T3, cortisol, and renin activity but her blood pressure is only slightly elevated and she has no symptoms or signs of thyrotoxicosis or Cushing syndrome, the most likely explanation is that:
Anonymous Quiz
13%
She has been treated with TSH and ACTH
0%
She has been treated with 13 and cortisick
80%
She is in the third trimester of pregnancy.
7%
She has an adrenocortical tumor
In humans, fertilization usually occurs in the
Anonymous Quiz
3%
Vagina.
0%
Cervix
3%
Uterine cavity,
94%
Uterine tubes.
Which of the following is not a steroid?
Anonymous Quiz
6%
17a-hydroxyprogesterone
0%
Estrone
85%
Relaxin
9%
Pragnenolone