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Biology > Reproduction > Flashcards

Reproduction Flashcards

1
Q

What is the proper name for sex cells?

A

Gametes

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2
Q

What is the male sex cell?

A

Sperm

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3
Q

What is the female sex cell?

A

Ovum (egg)

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4
Q

Sperm mixes in a fluid to make….

A

Semen

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5
Q

When are sperm made in the testes?

A

After puberty

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6
Q

One of the 2 ovaries release an egg every

A

28 days

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7
Q

An egg released from an ovary passes into

A

The Fallopian tube

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8
Q

The egg meets sperm in the….

A

Fallopian tube

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9
Q

If an egg isn’t fertilised by a sperm, the egg dies after

A

A day

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10
Q

How often does the menstrual cycle take place?

A

Every 28 days

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11
Q

When is the egg released in the menstrual cycle?

A

Day 14

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12
Q

How many stages are there to the menstrual cycle? Name them

A

4 stages

  1. Lining of uterus breaks down Day 1-3
  2. Lining of the uterus builds up Day 4-13
  3. Egg released Day 14
  4. Lining of uterus maintained 15-28
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13
Q

When in the menstrual cycle is a female most likely to become pregnant?

A

Day 14

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14
Q

Which stage in the menstrual cycle is the period?

A

Stage 1

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15
Q

What happens to periods if egg fertilises the sperm

A

Periods stop

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16
Q

What happens in stage 2 of the menstrual cycle?

A

The lining of the uterus thickens into a spongy layer full of blood vessels ready for implantation

17
Q

Describe the phases of fertilisation?

A 
Ovulation
Copulation
Fertilisation
Cell division
Implantation
18
Q

What is formed when the nuclei of the egg and sperm join together?

A

Zygote

19
Q

When does the fertilised egg divide into 2?

A

24 hours after fertilisation

20
Q

The fertilised egg divides into 32 cells by day….

A

Day 4

21
Q

When the fertilised egg has divided into 32 cells, it is called…

A

An embryo

22
Q

What develops one week after fertilisation?

A

Placenta

23
Q

Embryo - what has formed at 1 month?

A

Brain, heart, lungs, eyes, ears. It is only 6 mm long

24
Q

At 9 weeks, the body is completely formed and is called…

A

A foetus

25
Q

When is the foetus viable?

A

At 7 months

26
Q

When does a foetus look like a baby?

A

3 months

Biology (7 decks)

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