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Understanding the Self > Miracle of Life > Flashcards

Miracle of Life Flashcards

1
Q

How old is the earth?

A

4.5 BILLION YEARS

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2
Q

Where on earth did life first begin?

A

OCEANS

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3
Q

How many in each human body cell/somatic cell?

A

46

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4
Q

How many chromosomes in a human sex cell (sperm/ egg cell)?

A

23

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5
Q

What is the genetic material in the nucleus of a cell called?

A

DNA

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6
Q

How many egg cells are there in the human ovary?

A

1/4 BILLION EACH

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7
Q

How many chromosomes are there in the human egg cell?

A

23

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8
Q

When the follicle ruptures and the egg cell is released, what is this process called?

A

OVULATION

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9
Q

Where does the egg go after ovulation?

A

INTO THE FALLOPIAN TUBE/OVIDUCT

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10
Q

How small is a human egg cell?

A

SIZE OF A GRAIN OF SAND

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11
Q

How wide is the fallopian tube/oviduct?

A

TWICE AS THICK AS THE HUMAN HAIR

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12
Q

How long does it take for the egg to travel 5 inches down the fallopian tube?

A

3-4 DAYS TO MOVE 5 INCHES

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13
Q

How long will the egg live in the fallopian tube after ovulation?

A

24 HOURS

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14
Q

What happens to egg if it is not fertilized?

A

DISINTEGRATES

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15
Q

Name 2 female sex hormones

A

ESTROGEN AND PROGESTERONE

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16
Q

Name the male sex hormone

A

TESTOSTERONE

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17
Q

When can we tell if the fetus is male or female?

A

7 WEEKS AFTER CONCEPTION

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18
Q

How many people presently live on this planet?

A

(1991) 4 BILLION [3/12/12 - 7 BILLION]

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19
Q

How many millions of people are born each year?

A

128 MILION (1991)

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20
Q

Where are the sperms formed?

A

TESTES

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21
Q

What is the function of the Cowper’s gland?

A

LUBRICATING FLUID; SEMINAL FLUID

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22
Q

What do the seminal vesicle produce?

A

FRUCTOSE SUGAR SOLUTION

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23
Q

Through what tube do the sperm leave the male’s body?

A

URETHRA

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24
Q

What keeps the urine in the bladder from entering the urethra during intercourse?

A

VALVE MUSCLE

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25
Q

What is the length of the seminiferous tubules?

A

700 FEET

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26
Q

How many sperm are produced per day?

A

100 MILLION/ day

27
Q

Why must the testes be outside the body?

A

MYST BE SEVERAL DEGREES LOWER THAN THE NORMAL BODY TEMPERATURE TO PRODUCE SPERMS

28
Q

What do we call the pouch that contains/houses the testes?

A

SCROTUM

29
Q

What happens to the sperm if they are not ejaculated after several weeks?

A

THEY DIE AND ARE REABSORBED IN THE BODY

30
Q

How many sperm does an average male produce in his reproductive lifetime?

A

400 BILLION

31
Q

How long does it take for a sperm to mature and develop?

A

ONE

MONTH

32
Q

How many chromosomes are in the head of a human sperm cell?

A

23

33
Q

What are the cells that feed and protects the developing sperm cell?

A

Nurse Cells FEED AND PROTECT

34
Q

How many sperm cells are in the ejaculated semen?

A

200-300 million

35
Q

Where does the sperm develop its ability to swim?

A

EPIDIDYMIS

36
Q

What structure enables the sperm to swim?

A

FLAGELLUM

37
Q

What is the substance found in the sperm’s head?

A

A LAYER OF ENZYMES

38
Q

What does the layer of enzymes do in the sperm head?

A

THEY HELP SOFTEN THE CELL MEMBRANE OF THE EGG SO ONE OF THE SPERM CELL CAN PENETRATE AND FERTILIZE THE EGG CELL

39
Q

What is the percentage of the male’s sperm to come out as deformed and defective?

A

20 PERCENT

40
Q

What are the causes of sperm deformity?

A

SLIGHT ELEVATION OF TEMP. IN THE TESTES, OVERCROWDING, STRESS, CHEMICAL POLLUTION, RADIATION, POOR NUTRITION, TIGHT JEANS

41
Q

The seminal vesicles release what nourishing substance?

A

FRICTOSE

42
Q

How much semen is ejaculated?

A

1/2 TEASPOON

43
Q

How is semen forced out of the semen?

A

MUSCLE CONTRACTIONS

44
Q

What is the composition of Semen?

A

SEMINAL VESICLE AND SPERM

45
Q

What is the pH of the vagina?

A

Acidic (3.6 to 4.5 in most women)

46
Q

Why is the female vagina acidic?

A

TO PROTECT IT AGAINST BACTERIAL INFECTION

47
Q

How many sperms die in the vagina?

A

25 %

48
Q

How long does a sperm live inside a female’s body? I’m

A

28-48 HOURS

49
Q

What is the mouth/opening of the uterus called?

A

CERVIX

50
Q

What protein does the cervix secrete?

A

MUSIN

51
Q

What is the function of the Musin?

A

HELPS/AIDS THE SPERM TO SWIM FROM THE UTERUS TO THE FALLOPIAN TUBE

52
Q

What are fallopian tubes/oviduct lined with?

A

CILIA

53
Q

In what direction do the cilia beat and how does it affect the sperm?

A

DOWNWARD; MAKING IT DIFFICULT FOR THE SPERM TO SWIM

54
Q

Two hundred million sperm begin the journey, how many reaches the egg?

A

50 MILLION

55
Q

How many sperm actually fertilize the egg?

A

ONE

56
Q

Where does fertilization take place?

A

OVIDUCT/ FALLOPIAN TUBE

57
Q

What keeps the other sperms from fertilizing the egg once a sperm had penetrated?

A

CHEMICAL REACTION OCCURRING IN THE CELL MEMBRANE MAKING IT IMPERMEABLE

58
Q

What happens to the sperm once it penetrates the egg?

A

IT FALLS OFF

59
Q

What happens to the head of the sperm once its inside the egg cell?

A

SWELLS AND BREAKS OPEN RELEASING ITS DNA

60
Q

When does the fertilized egg begin to divide?

A

WITHON 24 HOURS

61
Q

Once the egg is fertilized and begin to divide what is it called?

A

ZYGOTE

62
Q

After 5 days what is the fertilized egg called?

A

BLASTOCYST- CONTAINS 70-100 CELLS

63
Q

When does the blastocyst implant in the uterus?

A

10 days after fertilization

64
Q

What feeds the blastocyst?

A

UTERUS LINING/ PLACENTA

Understanding the Self (1 decks)

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