Gametogenesis

Question 1

Gametogenesia is divided into

Answer 1

1) Spermatogenesis
2) Oogenesis

Question 2

The testis is covered with

Answer 2

a thick fibrous capsule called the tunica albuginea

Question 3

The lumen of each seminiferous tubule is full of ? its wall is lined by ?

Answer 3

full of sperms while its wall is lined by severel types of cells

Question 4

The cells on the wall of the seminiferous tubules from peripheral to central order are

Answer 4

spermatogonia
primary spermatocytes
secondary spermatocytes
and spermatids

Question 5

The cells in the wall of the seminiferous tubule are all separated into groups by the

Answer 5

long pyramidal Sertoli cells which serve for support and nutrition

Question 6

The interstitial tissue between the tubules contains

Answer 6

the Leydig cells which secrete testosterone

Question 7

Type A Spermatogonia developing to be Type B (Daughter) Spermatogonia process is called

Answer 7

Proliferation (↑ in cell number)
Mitosis

Question 8

Type B (Daughter) Spermatogonia developing to be Primary Spermatocyte in a proccess called

Answer 8

Growth
Mitosis

Question 9

Primary Spermatocyte developing to be Secondary Spermatocyte in a proccess called

Answer 9

Maturation
meosis 1

Question 10

Secondary Spermatocyte developing to be Spermatids go through a process called

Answer 10

Maturation
Meiosis 2

Question 11

Spermatids developing to be sperms go through a process called

Answer 11

Transformation (Spermiogenesis)

Question 12

First cell to have haploid No. of chromosome

Answer 12

Secondary Spermatocyte

Question 13

The stage where the spermatid transformation occur is

Answer 13

Transformation (Spermiogenesis)

Question 14

All the process of sperm formation is called

Answer 14

Spermatogenesis

Question 15

During meosis I what occurs

Answer 15

Crossover & interchange of chromatid segments

Question 16

Crossover & interchange of chromatid segments in meosis 1 allows what

Answer 16

allows genetic variability in the resulting sperm

Question 17

In Spermiogenesis the nucleus forms

Answer 17

the head of the sperm

Question 18

In Spermiogenesis the Golgi apparatus forms

Answer 18

head cap (acrosome)

Question 19

In Spermiogenesis the centriole forms

Answer 19

elongates to form neck, middle piece and tail

Question 20

In Spermiogenesis the Mitochondria forms

Answer 20

spiral (helical) sheath around the middle piece and excess cytoplasm is shedded

Question 21

Sperms number per ml is

Answer 21

Numerous 100 million per ml

Question 22

Sperm size

Answer 22

Minute (60 micron)

Question 23

Can sperm penetrate?

Answer 23

Yes

Question 24

Is sperm haploid or diploid

Answer 24

Haploid No.

Question 25

Sperm (energy wise)

Answer 25

Has source of energy

Question 26

Is sperm motile? If yes how manu mm can it move per min?what is the major part for motility?

Answer 26

It is Motile 3 mm/min End piece

Question 27

What provides energy to the sperm?

Answer 27

middle piece

Question 28

The chromosome site in the sperm is

Answer 28

The nucleus

Question 29

After ejaculation the sperm can live up to

Answer 29

72 hours inside the female body and if fertilization doesn't occur the sperm dies

Question 30

If there is no ejaculation

Answer 30

the stored sperms inside the ampulla of vas die

Question 31

At least how many percent of sperms are motile

Answer 31

70% are motile

Question 32

Source of the semen is

Answer 32

Sperms: from the testis Secretions of seminal vesicles, prostate and bulbo-urethral glands

Question 33

Volume of the semen

Answer 33

3-5 ml per ejaculation

Question 34

If the count of the sperm is decreased

Answer 34

oligospermia

Question 35

If sperms are absent

Answer 35

azospermia

Question 36

If the sperms are ejaculated dead

Answer 36

necrospermia

Question 37

Low semen volume is

Answer 37

less than 1.5 ml hypospermia

Question 38

Poor sperm motility

Answer 38

asthenozoospermia

Question 39

Abnormal forms should not exceed

Answer 39

10%.

Question 40

Define Gametogenesis

Answer 40

the production of mature gametes (sperms and ova) by the mature gonads (testis or ovary).

Question 41

Define spermatogenesis

Answer 41

formation of sperms with haploid number of chromosomes

Question 42

Site of spermatogenesis

Answer 42

Seminiferous tubules of the testis

Question 43

Duration of spermatogenesis

Answer 43

From puberty till death

Question 44

Proliferation

Answer 44

increase in the number of cells

Question 45

First maturation division

Answer 45

The primary spermatocyte divides by meiosis I into two secondary spermatocytes

Question 46

Second maturation division

Answer 46

The secondary spermatocyte divides by meiosis II into two spermatids (haploid too)

Question 47

Most of its the spermatid cytoplasm becomes

Answer 47

shedded

Question 48

The sperms undergo maturation in the epididymis for

Answer 48

2 months

Question 49

After 2 months maturation in the epididymis the sperm are

Answer 49

they are stored in the ampulla of vas deferens. If not ejaculated, they die

Question 50

The Head of the sperms contains

Answer 50

Nucleus Acrosomal cap

Question 51

The Nucleus contains

Answer 51

haploid number of chromosomes which carry the genetic characters

Question 52

Acrosomal cap secretes

Answer 52

enzymes which facilitate penetration of the ovum

Question 53

The Acrosomal cap

Answer 53

is covered by a glycoprotein coat which prevent premature liberation of the enzymes

Question 54

Neck contains

Answer 54

2 centrioles (proximal & distal) from which arises an axial filament

Question 55

Body or middle piece contains

Answer 55

a helical mitochondrial sheath (10-14 turns) around the axial filament. The mitochondria produce energy for motility.

Question 56

Tail contains the

Answer 56

axial filament responsible for motility. Its terminal 5-10 microns (the end piece) are naked

Question 57

sperms Abnormal forms should not exceed

Answer 57

10%