fertilization Flashcards

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1
Q

what is a gamete?

A

specialized sex cells that contain half of the genetic material of a normal human cell (sperm and egg)

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2
Q

how many chromosomes does each sperm have?

A

23

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3
Q

how many chromosomes does each egg have?

A

23

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4
Q

do sperm and egg cells have the same amount of chromosomes?

A

yes

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5
Q

where does fertilization normally occur?

A

fallopian tubes

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6
Q

what is the path of sperm cell once it has entered the vagina?

A

vagina->cervix->uterus->one of the fallopian tubes

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7
Q

how does fertilization occur?

A

the fastest/healthiest sperm cells reach the egg, sperm contains chemical that breaks down coating around egg, several sperm cells burrow into the covering to make a hole for one to enter, once it enters it leaves its tail outside and a chemical change prevents more from entering

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8
Q

when is fertilization most likely to occur?

A

ovulation

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9
Q

can a woman only get pregnant during ovulation?

A

no

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10
Q

what is a zygote?

A

fertilized egg

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11
Q

what happens to egg after fertilization?

A

after the zygote travels to the uterus it attaches to the lining of the uterus and becomes a blastocyst

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12
Q

what is prenatal care?

A

taking care of yourself and the baby as a pregnant mother (eg, no alcohol/drugs, no raw fish, no smoking)

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13
Q

what are causes of infertility?

A

-irregular ovulation
-low sperm count
-poor swimming sperm
-blocked fallopian tubes
-old eggs

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14
Q

define embryo

A

developing baby (up to 8 weeks)

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15
Q

define fetus

A

developing baby after 8 weeks

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16
Q

define placenta

A

blood-rich organ that nourishes the developing baby

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17
Q

define umbilical cord

A

connects baby to placenta

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18
Q

define amniotic sac

A

thin membrane filled with fluid that protects the baby

19
Q

define artificial insemination

A

when a doctor inserts semen into uterus w/o penis

20
Q

define in vitro fertilization

A

when sperm and eggs are removed then fertilize them in labs and then put into woman

21
Q

define surrogate

A

if mother is unable to/doesnt want to be pregnant, they can pay another woman (the surrogate) to carry the baby

22
Q

define midwife

A

trained to deliver babies but is not a doctor

23
Q

define anesthetic

A

causes insensitivity to pain

24
Q

define epidural

A

shot in the spine causes numbness from spine down

25
Q

define natural childbirth

A

vaginal birth with no numbing agents or medication

26
Q

define c-section

A

cut open uterus and retrieve baby

27
Q

why are c-sections performed?

A

-if you already had a c-section
-baby stuck
-baby is facing wrong way
-mother or baby is distressed
-umbilical cord wrapped around baby neck

28
Q

what is the difference between the fertilization of fraternal and identical twins?

A

fraternal: 2 eggs are fertilized
identical: fertilized egg splits into two

29
Q

what are the three stages of birth?

A

labor, delivery, afterbirth

30
Q

what is labor?

A

contractions of the uterus (cervix is dilating). this is the longest stage

31
Q

what is delivery?

A

baby comes out and the umbilical cord is cut

32
Q

what is afterbirth?

A

delivery of the placenta

33
Q

what is the importance of mother’s milk?

A

passes antibodies from mother to weak baby

34
Q

what is a blastocyst?

A

after the zygote attaches to the lining of the uterus, it becomes a blastocyst

35
Q

specialized sex cells that contain half of the genetic material of a normal human cell (sperm and egg)

A

gamete

36
Q

what happens in the fallopian tubes?

A

fertilization typically occurs

37
Q

developing baby (up to 8 weeks)

A

embryo

38
Q

developing baby after 8 weeks

A

fetus

39
Q

what is the timline of an egg to baby

A

egg->zygote->blastocyst->embryo->fetus->baby

40
Q

blood-rich organ that nourishes the developing baby

A

placenta

41
Q

what is the timeline of an egg to baby

A

egg->zygote->blastocyst->embryo->fetus->baby

42
Q

thin membrane filled with fluid that protects the baby

A

amniotic sac

43
Q

inserting semen with out penis

A

artificial insemination

44
Q

fertilizing egg in lab

A

in vitro fertilization