Males

Question 1

Which hormone are sertoli cells responsive to?

Answer 1

FSH

Question 2

What percentage of testosterone is unbound (in men)

Answer 2

2%
Mostly bound to SHBG and albumin

(SHBG = sex hormone binding globulin)

Question 3

Lower limit of sperm count

Answer 3

15 million / mL

Question 4

How many lobules per testis

Answer 4

250

Question 5

Normal range of ‘normal morphology’ of sperm

Answer 5

> 4%

Question 6

How many seminiferous tubules per testicular lobule

Answer 6

2

Question 7

Epithelium of male urethra

Answer 7

Trick question there are 3 parts :(

Proximal ie near the prostate = transitional (just like the bladder)

Middle section = stratified columnar

Willy tip = stratified squamous

Question 8

Where are Leydig cells and what do they do?

Answer 8

Leydig cells are in testes

They get the laaaadies:
Secrete testosterone
Sensitive (have receptors for) LH

Question 9

Where are sertoli cells and what do they do?

Answer 9

Sertoli cells are in the testes

Sertoli cells stop.
Secrete inhibin
Form blood:testes barrier
Sensitive to (has receptors for) FSH. Full stop

Question 10

Average length of male urethra

Answer 10

22.5cm

Question 11

47XYY phenotype

Answer 11

NORMAL :(

Kleinfelters = 47XXY