Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

DS 8E Science 3 > B5: Fertilisation and the Development of the Foetus > Flashcards

B5: Fertilisation and the Development of the Foetus Flashcards

1
Q

What is the scientific term for reproductive cells (egg and sperm cells)?

A

Gametes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

The male gametes are…

A

Sperm cells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

The female gamete is the

A

Egg cell (Ovum)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

When an egg and sperm nuclei fuse together, we call it…

A

……fertilisation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

The oviducts are lined with cells lined with small hair like structures called…

A

Cilia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the function of the cilia that line the oviducts?

A

They waft the egg released by the ovary along to the uterus.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What happens after fertilisation?

A
  1. The fertilised egg divides into a ball of cells called an embryo. 2. The embryo attaches to the lining of the uterus and begins to develop into a baby. This is called implantation.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

How often is an egg released from an ovary?

A

Once a month

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Where does fertilisation occur?

A

The Oviduct

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Why can only one sperm fertilise the egg?

A

The membrane of the egg (ovum) thickens when the first sperm has penetrated.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the scientific name for an egg that has been fertilised?

A

A zygote

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the function of the umbilical cord?

A

It connects the fetus to the placenta.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

In mammals, the time spent in the uterus during development is called…

A

….gestation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What effect can smoking have on an unborn baby?

A

Premature birthLow birth weight

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the function of the fluid sac (amniotic sac)?

A

It acts as a shock absorber, protecting the foetus from any bumps.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the function of a placenta?

A

* An organ where substance pass between the mother’s blood and the fetus’s blood. * It acts as a barrier, which stops infections and harmful substances reaching the foetus.

17
Q

What effect can alcohol have on an unborn baby?

A

Poor brain development

18
Q

How long is the human gestation period?

A

9 months (40 weeks)

19
Q

Does the blood of mother and fetus mix when it is developing in the uterus?

A

NO - but useful substances like nutrients and oxygen can pass from mother to baby through the placenta.

20
Q

When a fertilised egg (zygote) divides into a ball of cells, we call the ball of cells an…

A

embryo

21
Q

The menstrual cycle lasts for…

A

28 days (approximately)

22
Q

What happens on day 1 of the menstrual cycle?

A

Bleeding as the lining of the uterus breaks down.

23
Q

What is the function of the uterus lining?

A

To provide a spongy, blood rich layer for embryo implantation.

24
Q

What happens on day 14 of the menstrual cycle?

A

Ovulation - an egg is released from one of the ovaries.

25
Q

What happens if a sperm cell does not meet the egg after ovulation has happened?

A

The lining of the uterus breaks down and the menstrual cycle starts again from day 1.

DS 8E Science 3 (11 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions