Reprod_Long3

Set 1

Set 2

Set 3

The Female Reproductive System, continued.

Question 1

Label the diagram below. (10)

When”labelling” diagrams, say the term aloud to yourself first before clicking on the “?”.

chorion

amnion

amniotic fluid

vagina

uterus wall

endometrium

foetus

umbilical cord

chorionic villi

placenta

Question 2

List FIVE functions of the placenta. (5)

1. Forms link between mother and foetus.

2. Serves as organ for gaseous exchange, excretion and nutrient supply for the foetus.

3. Serves as a micro-filter by preventing bacteria entering the foetus.

4. Produces antibodies to provide passive immunity for the foetus.

5. Secretes progesterone to maintain the uterine wall whilst pregnancy lasts.

Question 3

Study the diagram below, then answer the questions that follow.

Name parts for A and B. (2)

A: Umbilical cord

B: Placenta

Explain ONE way in which the part labelled B is structurally adapted for its function. (2)

Has folds/villi to enlarge the surface area.

Enriched with blood vessels for transport of gases/ nutrients/ waste products.

Selective permeable membranes to promote diffusion of gases/ substances.

Contains blood sinuses to bring blood of mother in close association with that of foetus.

(Any 1)

StateTWO functions of the fluid found at C. (2)

Acts as a shock absorber/prevents mechanical damage.

Prevent great variation in temperature.

Allows for movement of the foetus.

Passes out before birth to lubricate the birth canal.

(Any 2)

Name the condition that might occur in the foetus if the mother consumes too much alcohol during the pregnancy. (1)

Foetal alcohol syndrome

Question 4

Set 1

Set 2

Set 3

Choose

Set 4

Outline the steps involved for successful in vitro fertilisation to occur. (5)

Woman given fertility drugs to produce many eggs at the same time.

Eggs collected and placed in a petri dish with a special solution.

Sperm collected from male are allowed to mix with the eggs in the petri dish.

Fertilised egg divides repeatedly to form the blastula. The blastula is placed into the woman’s uterus.

Normal development of the foetus occurs.

Questions source: DBE (Authorisation 11798)

- Greg Gopaul -