Male repro

Question 1

Downs syndrome is due to what

Answer 1

three copies, trisomy, of chromosme 21 are present

Question 2

Turners syndrome is due to what

Answer 2

Female having one X instead of XX - XO

Question 3

The scrotum is what

Answer 3

Sac of skin and superficial CT

Question 4

Purpose of the scrotum

Answer 4

Provides lower temp for the sperm, about 3 Celsius less

Question 5

What is the elevation and descent of the scrotum controlled by

Answer 5

cremaster muscles, skeletal muscle that arise from oblique muscles

Question 6

What other muscle can also change to correct the temperature of the scrotum

Answer 6

Dartos Muscle, layer of smooth muscle within scrotal wall

Question 7

Each testicl contains what

Answer 7

coiled tubes known as seminiferous tubules

Question 8

The cells making up the epithelium of the seminiferous tubules are what

Answer 8

spermatogenic cells

Question 9

spermatogenic cells gives rise to what

Answer 9

sperm, after a series of cell divisions

Question 10

Within the epithelium of the seminiferous tubules, what other cells are there and what does this aid for

Answer 10

sustentacular cells/sertoli cells, aid sermatogenesis

Question 11

The soft tissue around the ST are what cells and what does this produce

Answer 11

Intersistital cells/Leydig cells, produce testosterone

Question 12

Testosterone is required for what

Answer 12

sperm maturation, secondary sex characteristics and gonad development