Test Ch-13, 15

Question 1

Why do cells reproduce?

Answer 1

Cells reproduce so organs can grow larger.

Question 2

what are the stages of mitosis?

Answer 2

Interphase
Prophase
Metaphase
Anaphase 
Telophase
Cytokinesis

Question 3

What happens during interphase?

Answer 3

Interphase is the stage that the cell is not dividing. At this stage the cell is getting ready for mitosis to occur.
- DNA replication occurs

Question 4

What happens during prophase?

Answer 4

• Chromosomes appear as pairs.

- Nuclear membrane starts to break down.

Question 5

What happens during metaphase?

Answer 5

• Chromosomes line up in the middle of the cell.

- Spindle fibres attach to the centromere of the chromosome.

Question 6

What happens during anaphase?

Answer 6

• Chromosomes are pulled apart by spindle fibres.

- They are moved to opposite ends of the cell.

Question 7

What happens during telophase?

Answer 7

• Nuclear membrane forms around the chromatids.

- Centrioles disappear.

Question 8

What happens during cytokinesis?

Answer 8

• Cell becomes 2 daughter cells.

- Both contain 46 chromosomes.

Question 9

What is a chromatid?

Answer 9

A chromatid is when a chromosomes duplicates and becomes two strands.

Question 10

What is mitosis about?

Answer 10

Mitosis is about the production of body cells only.

Question 11

What is mitosis?

Answer 11

Division of the nucleus.

Question 12

What is G1 phase?

Answer 12

First growth phase; during this phase cell produces new proteins. The phase ends when cell’s DNA starts to duplicate.

Question 13

What is S phase?

Answer 13

During this phase DNA molecules in the cell nucleus form duplicates of themselves.

Question 14

What is G2 phase?

Answer 14

Is a short phase, involves preparation for cell division.

Question 15

What is M phase?

Answer 15

The cell divides into two daughter cells.

Question 16

What are the ovaries?

Answer 16

Are the female sex organ.

Question 17

What happens in the ovaries?

Answer 17

Eggs are produced.

Question 18

What is ovulation?

Answer 18

The release of an egg.

Question 19

What is ZEF

Answer 19

Z- zygote
E- Embryo
F- Foetus

Question 20

Where is sperm produced from?

Answer 20

Sperm is produced from the testes.

Question 21

What is the skin - covered pouch called covering the testes?

Answer 21

The scrotum.

Question 22

What does the urethra carry?

Answer 22

Urine and sperm.

Question 23

Why does erectile tissue have sponge-like spaces?

Answer 23

Blood fills these spaces when the male is sexually aroused.

Question 24

What does the uterus do?

Answer 24

Is a single hollow organ.

Question 25

What do the two seminal vesicles do?

Answer 25

Secrete fluid that makes 60% of the semen.

Question 26

What does the prostate gland do?

Answer 26

Secretes a fluid which is part of the semen.

Question 27

What does the bulbo-urethral glands do?

Answer 27

Two glands secrete clear mucus just before ejaculation occurs.

Question 28

What does the scrotum do?

Answer 28

A skin-covered pouch that holds the testes.

Question 29

What do the testes do?

Answer 29

Primary male reproductive system, they produce sperm.

Question 30

What does the epididymis do?

Answer 30

Sperm are stored and matured.

Question 31

What does the erectile tissue do?

Answer 31

Has spongy-like spaces that is filled with blood and causes the penis to become erect.

Question 32

What does the urethra do?

Answer 32

It carries either urine or semen out of the body?

Question 33

What does the vas deferens do?

Answer 33

(the sperm duct) carries sperm away from testes to urethra.

Question 34

What does the uterus do? (female)

Answer 34

A hollow organ lined with the endometrium.

Question 35

What does the cervix do?

Answer 35

(Neck of the uterus) protrudes into the vagina/where semen is deposited.

Question 36

What does the vagina do?

Answer 36

Receives the penis during intercourse. Birth canal.

Question 37

What is the labia?

Answer 37

Fleshy folds of skin that surround the vaginal opening.

Question 38

What is the clitoris?

Answer 38

Sensitive to touch and when stimulated becomes erect.

Question 39

What does the ovary do?

Answer 39

The two ovaries produce and release eggs.

Question 40

What does the uterine tube do?

Answer 40

(also known as oviducts/fallopian tubes) They carry eggs down into the uterus. Fertilisation occurs within them.