Menstrual Cycle & Fertilization Flashcards

0
Q

A gland that secretes follicle stimulating hormone and little leutenizing hormone into the bloodstream which causes follicle to begin to mature

A

Pituitary gland

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1
Q

Part of the brain that realses the chemical messenger Follicle Stimulating Hormone Releasing Factor, which is sent to the pituitary gland

A

Hypothalamus

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2
Q

Another hormone released by the maturing follicles

A

Estrogen

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3
Q

Hormone that Causes the lining of the uterus to thicken and cervical mucous to change

A

Estrogen

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4
Q

Triggers the one most mature follicle to burst open and release an egg

A

Leutenizing hormone

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5
Q

Follicle burst open and release an egg

A

Ovulation

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6
Q

Occurs when sperms are present

A

Fertilization

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7
Q

Edometrium lining sheds causing..

A

Menstruation

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8
Q

Layer closest to cell membrane, thick, transparent, non cellular

A

Zona pellucida

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9
Q

Surrounding the zona pellucida, thicker coat, formed of radially elongated follicular cells.

A

Corona radiata

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10
Q

Thin inner transparent layer, secreted by the ovum itself

A

Vitelline membrane

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11
Q

Sperm undergoes removal of plasma membrane overlaying spermatozoa’s acrosomal area called..

A

Capacitation

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12
Q

First 14 days of development is..

A

Pre embryonic stage

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13
Q

Within 24 hrs after fertilization, zygote enter mitotic division dividing rapidly into many cells called…

A

Cleavage

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14
Q

When zygote continues to divide it is called… Which passes slowly through the fallopian tube to the uterus

A

Morula

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15
Q

Intracellular fluid in morula increases called..

A

Blastocycst

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16
Q

Trophoblast develop into one of the embryonic membrane called…

A

Chorion

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17
Q

Produced by the placenta, which prevents the ovaries from releasing the eggs, and stimulates the ovaries to produce estrogen and progesterone continuously after 12 days of conception

A

Human chorionic gonadotropin

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18
Q

First and outer most membrane of the fetus

A

Chorion

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19
Q

Second membrane of the fetus

A

Amnion

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20
Q

Thin protective membrane that contains amniotic fluid, covers the the embyro and yolksac

A

Amnion

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21
Q

Connects the developing fetal tissues to the uterine wall

A

Placenta

22
Q

Placenta approximately weighs..

A

500 grams

23
Q

On maternal side, these villious tree structures are grouped into lobules called..

A

Cotelydons

24
Q

Functions of placenta?

A
Nutrition
Excretion
Metabolic 
Endocrine
Immune
25
Q

After implantation the endometrium is called as

A

Decidua

26
Q

Decidua that covers the blastocysts is called..

A

Decidua capsularis

27
Q

Portion under the implanted blostocysts is called..

A

Decidua basalis

28
Q

Portion lining rest of the uterine cavity is called..

A

Decidua vera / parietalis

29
Q

Surrounds the blood vessels in the umbilical cord

A

Warton’s jelly

30
Q

Has 3 vessels two small artey and one large vein formed from the amnion

A

Umbilical cord

31
Q

Where does the egg wait for fertilization?

A

Ampulla portion

32
Q

How much sperms are deposited into the vagina?

A

200-300 million sperms

33
Q

An egg is viable for how many hours?

A

18-24 hours

34
Q

How long are sperms viable?

A

48-72 hours

35
Q

Enzymes of a sperm that can break down the ovum’s corona radiata

A

Acrosomes

36
Q

This ovum layer undergoes a reaction once a sperm enters the ovum and prevent additional sperm entry

A

Zona pellucida

37
Q

How many days does the Zygote cell stay in the fallopian tube until morula forms?

A

3 days

38
Q

Zona pellucida is replaced by ______ between 7-10 days

A

Trophoblast

39
Q

Blastocyst develop into double layer of cell called embryonic disc, ehat are the layers called?

A

Embryo and amnion

40
Q

Functions of amniotic fluid?

A
Prevent mechanical injury
Controls embryonic temperature
Permit growth and development of embyro
Allow free movement
Prevent umbilical cord compression
Fluid used for analysis for fetal health and maturity
41
Q

10-14th day blastocysts differentiate into:

A

Ectoderm, mesoderm, endoderm

42
Q

Where does the egg wait for fertilization?

A

Ampulla portion

43
Q

How much sperms are deposited into the vagina?

A

200-300 million sperms

44
Q

An egg is viable for how many hours?

A

18-24 hours

45
Q

How long are sperms viable?

A

48-72 hours

46
Q

Enzymes of a sperm that can break down the ovum’s corona radiata

A

Acrosomes

47
Q

This ovum layer undergoes a reaction once a sperm enters the ovum and prevent additional sperm entry

A

Zona pellucida

48
Q

How many days does the Zygote cell stay in the fallopian tube until morula forms?

A

3 days

49
Q

Zona pellucida is replaced by ______ between 7-10 days

A

Trophoblast

50
Q

Blastocyst develop into double layer of cell called embryonic disc, ehat are the layers called?

A

Embryo and amnion

51
Q

Functions of amniotic fluid?

A
Prevent mechanical injury
Controls embryonic temperature
Permit growth and development of embyro
Allow free movement
Prevent umbilical cord compression
Fluid used for analysis for fetal health and maturity
52
Q

10-14th day blastocysts differentiate into:

A

Ectoderm, mesoderm, endoderm