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Understanding the Self > Miracle of Life > Flashcards

Miracle of Life Flashcards

(64 cards)

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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
What is the length of the seminiferous tubules?
700 FEET
26
How many sperm are produced per day?
100 MILLION/ day
27
Why must the testes be outside the body?
MYST BE SEVERAL DEGREES LOWER THAN THE NORMAL BODY TEMPERATURE TO PRODUCE SPERMS
28
What do we call the pouch that contains/houses the testes?
SCROTUM
29
What happens to the sperm if they are not ejaculated after several weeks?
THEY DIE AND ARE REABSORBED IN THE BODY
30
How many sperm does an average male produce in his reproductive lifetime?
400 BILLION
31
How long does it take for a sperm to mature and develop?
ONE | MONTH
32
How many chromosomes are in the head of a human sperm cell?
23
33
What are the cells that feed and protects the developing sperm cell?
Nurse Cells FEED AND PROTECT
34
How many sperm cells are in the ejaculated semen?
200-300 million
35
Where does the sperm develop its ability to swim?
EPIDIDYMIS
36
What structure enables the sperm to swim?
FLAGELLUM
37
What is the substance found in the sperm's head?
A LAYER OF ENZYMES
38
What does the layer of enzymes do in the sperm head?
THEY HELP SOFTEN THE CELL MEMBRANE OF THE EGG SO ONE OF THE SPERM CELL CAN PENETRATE AND FERTILIZE THE EGG CELL
39
What is the percentage of the male's sperm to come out as deformed and defective?
20 PERCENT
40
What are the causes of sperm deformity?
SLIGHT ELEVATION OF TEMP. IN THE TESTES, OVERCROWDING, STRESS, CHEMICAL POLLUTION, RADIATION, POOR NUTRITION, TIGHT JEANS
41
The seminal vesicles release what nourishing substance?
FRICTOSE
42
How much semen is ejaculated?
1/2 TEASPOON
43
How is semen forced out of the semen?
MUSCLE CONTRACTIONS
44
What is the composition of Semen?
SEMINAL VESICLE AND SPERM
45
What is the pH of the vagina?
Acidic (3.6 to 4.5 in most women)
46
Why is the female vagina acidic?
TO PROTECT IT AGAINST BACTERIAL INFECTION
47
How many sperms die in the vagina?
25 %
48
How long does a sperm live inside a female's body? I'm
28-48 HOURS
49
What is the mouth/opening of the uterus called?
CERVIX
50
What protein does the cervix secrete?
MUSIN
51
What is the function of the Musin?
HELPS/AIDS THE SPERM TO SWIM FROM THE UTERUS TO THE FALLOPIAN TUBE
52
What are fallopian tubes/oviduct lined with?
CILIA
53
In what direction do the cilia beat and how does it affect the sperm?
DOWNWARD; MAKING IT DIFFICULT FOR THE SPERM TO SWIM
54
Two hundred million sperm begin the journey, how many reaches the egg?
50 MILLION
55
How many sperm actually fertilize the egg?
ONE
56
Where does fertilization take place?
OVIDUCT/ FALLOPIAN TUBE
57
What keeps the other sperms from fertilizing the egg once a sperm had penetrated?
CHEMICAL REACTION OCCURRING IN THE CELL MEMBRANE MAKING IT IMPERMEABLE
58
What happens to the sperm once it penetrates the egg?
IT FALLS OFF
59
What happens to the head of the sperm once its inside the egg cell?
SWELLS AND BREAKS OPEN RELEASING ITS DNA
60
When does the fertilized egg begin to divide?
WITHON 24 HOURS
61
Once the egg is fertilized and begin to divide what is it called?
ZYGOTE
62
After 5 days what is the fertilized egg called?
BLASTOCYST- CONTAINS 70-100 CELLS
63
When does the blastocyst implant in the uterus?
10 days after fertilization
64
What feeds the blastocyst?
UTERUS LINING/ PLACENTA

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