Testes Anatomy

Question 1

Many small gametes?

Answer 1

Spermatozoa

Question 2

Where are gametes made?

Answer 2

Seminiferous tubules

Question 3

Name the three stages of Spermatogenesis

Answer 3

1. Mitotic proliferation of germ line stem cells
2. Reduction to haploid state by meiosis
3. Differentiation into mature spermatozoa

Question 4

Where does mitotic proliferation occur?

Answer 4

Basal side of tubule

Question 5

Count for subfertility

Answer 5

less than 2^7 per ml (should be 10^8)

Question 6

Anatomy of seminiferous tubule (4)

Answer 6

myoid cell basal layer
Sertoli cells
Spermatids
Developing spermatozoa

Question 7

Purpose of Sertoli cells

Answer 7

Look after/ share limited resources during differentiation/ release into lumen

Question 8

Structure of sperm

Answer 8

Golgi apparatus- acrosome and head cap
Mitochondrial sheath
Tail (mature)

Question 9

Purpose of tight junctions between Sertoli cells

Answer 9

To prevent immune system destroying sperm cells during puberty

Question 10

Prefix for testis

Answer 10

Orch

Question 11

Process of maturation

Answer 11

1. seminiferous tubules to epididymis

2. Epididymis secretions activate sperm so capable of swimming

Question 12

Where are androgynous hormones made?

Answer 12

Leydig cells in the testis- testosterone

Question 13

What is the function of a myoid cell?

Answer 13

Contraction of sperm ducts to move sperm passively out of the testis

Question 14

What is the function of a Sertoli cell?

Answer 14

Making cytoplasmic bridges to support a developing sperm cell