Male Redproductive System

Question 1

Function of testes

Answer 1

Produce gametes and testosterone

Question 2

Function of Epididymis

Answer 2

Sperm are stored there to mature and become fully mobile. Sperm pass along here to the vas deferens.

Question 3

Function of vas deferens

Answer 3

Carries sperm from testicle to urethra.

Question 4

Function of seminal vesicle

Answer 4

Secretes seminal fluid.

Question 5

Function of prostate gland.

Answer 5

Releases semen into the urethra

Question 6

Function of urethra

Answer 6

Duct which carries semen and urine from the bladder

Question 7

Describe the parts of sperm

Answer 7

• nucleus
• acrosome (contains enzymes)
• neck (contains mitochondria)
• cytoplasm
• flagellum (use atp to propel the sperm)

Question 8

Outline the route taken from the testes by the sperm as it leaves the body

Answer 8

1st. Sperm leaves the testes and travel down sperm duct
2nd. Sperm travels through the glands
3rd. Glands provide sperm with food so they have energy
4th. The sperm duct joins the urethra, which carries the sperm out of the body.

Question 9

How many chromosomes does each gamete contain

Answer 9

23

Question 10

What is the role of the seminal vesicles

Answer 10

Secrete a thick, clear fluid like mucus that nourishes the sperm.

Question 11

What is the role is the Cowper’s gland

Answer 11

Secretes a lubricant for sperm

Question 12

Where is sperm produced

Answer 12

In the seminiferous tubules in the testes. There about 1000 in each testis.

Question 13

What is the interestitial cell and where is it found m

Answer 13

Produces male hormone testosterone and is found in the seminiferous tubules.

Question 14

Why do the testes hang outside the abdominal cavity

Answer 14

So that the sperm do not overheat

Question 15

What is the 1st stage of spermatogenesis

Answer 15

MULTIPLICATION

• primordial germ cells divide several times by mitosis to produce spermatogonia

Question 16

What is the 2nd stage of spermatogenesis

Answer 16

GROWTH

•spermatogonia grow, undergoing further decisions by mitosis, to form primary spermatocytes (diploid)

Question 17

What is the 3rd stage of spermatogenesis

Answer 17

MATURATION

•primary spermatocytes undergo the first meiotic division to form secondary spermatocytes (haploid)

Question 18

What is the 4th stage of spermatogenesis

Answer 18

Secondary spermatocytes undergo the second meiotic division to form spermatids (haploid, but without the flagellum, acrosome etc)

Question 19

What is the 5th stage of spermatogenesis

Answer 19

Spermatids differentiate and grow to form spermatozoa (sperm)

Question 20

How many spermatids does spermatogenesis produce

Answer 20

4

Question 21

Name the part of the sperm cell that contains enzymes which assist in fertilisation

Answer 21

Acrosome

Question 22

Describe the function of the enzymes in the acrosome

Answer 22

They digest the follicle cells to allow the cell membranes of the sperm and ovum to fuse.

Question 23

Describe what happens during capacitation of a sperm

Answer 23

Removing of the coating around the sperm to expose the acrosome