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Normal OB > Lesson 2B > Flashcards

Lesson 2B Flashcards

1
Q

Fertilization

A

Is the joining of two gametes to form a zygote

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2
Q

Zygote

A

Is the union of the sperm cell and the egg cell

- fertilization

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3
Q

What is released during ovulation?

A

2 deg oocyte

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4
Q

Spermatozoon

A

Sperm cell

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5
Q

What kind of cells are oocytes and and spermatozoons?

A

Haploid cells

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6
Q

What kind of cells are zygotes?

A

Diploids

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7
Q

What processes to diploid (zygotes) cells go through?

A

Mitosis

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8
Q

How many chromosomes do you have at fertilization?

A

46 chromosomes

- 23 pairs from each parent

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9
Q

When does fertilization occur?

A

During the first 24 hours of ovulation

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10
Q

Where does fertilization occur?

A

Within the ampullary region of the fallopian tube

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11
Q

How does the sperm get to the ovary? (4)

A
  1. Deposited in the vaginal fornix
  2. Through the cervical canal
  3. Up the endometrial cavity
  4. Down the fallopian tube
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12
Q

How does sperm move? (2)

A
  1. Flagella
    - sperm tails
  2. Muscular contractions
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13
Q

What does the second oocyte have?

A

A protective shell that must be penetrated

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14
Q

How do sperm get through the oocytes protective shell?

A

They have enzymes that help digest through the corona radiata and bind to the zona pellucida

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15
Q

What happens once the sperm fuses to the oocyte?

A

The outer sperm head layer is sloughed off

- exposing more enzymes

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16
Q

What zone is impenetrable to other sperm?

A

Zona pellucida

17
Q

How does the sperm get to the egg in order to form the zygote?

A

The tail of the sperm detaches and the sperm’s pronucleus works towards the egg’s pronucleus

18
Q

What happens to the zygote as is makes it way towards the endometrial canal to get implanted?

A

It will begin to divide

19
Q

Decidual reaction

A

The thickening of the endometrium as a result of the pregnancy

20
Q

What does the zygote develop into?

A

An embryo

21
Q

What does the embryo develop into?

A

A fetus

Normal OB (18 decks)

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