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Embryology > Gametogenesis II > Flashcards

Gametogenesis II Flashcards

1
Q

Initial Rapid transport of sperm in Cervical canal

A
  • 5->20 minutes following ejaculation
  • relies mostly on muscular movements of FEMALE
  • NOT as capable of fertilizing
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2
Q

Acrosomal Phase of Spermatogenesis

A
  • Rotation of sperm so Acrosomal pole faces seminiferous tubule
  • Cytoplasm displaced toward tail
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3
Q

Ampulla

A
  • “Handle” portion of the Fallopian tubes

- Site of SLOW transport
72 hours

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4
Q

Major Acrosomal enzymes

A
  • Hyaluronidase

- Zona Lysin

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5
Q

LH interactions of Sperm Cells

A
  • LH from AP bind to Leydig cells
  • Leydig cells synthesize Testosterone
  • Testosterone carried to the bone to Sertoli cells and other sexual tissue
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6
Q

Sperm are capable of fertilization by the time they reach the ______ of the Epididymis.

A

TAIL

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7
Q

Purpose of Leydig cells?

A

Produce Testosterone

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8
Q

Slow transport of sperm in Cervical canal

A
  • 2->3 mm per hour
  • Involves swimming through cervical mucous
  • may reach oviducts in 2-4 days
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9
Q

How is the egg transported to the Uterus?

A

Mostly through smooth muscle contractions

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10
Q

Cap Phase of Spermatogenesis

A

Mature acrosome forms a CAP over the Nucleus

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11
Q

The Primitive sex cords turn into what?

A

Seminiferous tubules

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12
Q

Golgi Phase of Spermatogenesis

A
  • Proacrosomal vesicles

- Acrosomal vesicles

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13
Q

Fimbriae of the uterine Tube is also known as what?

A

Catchers mitt

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14
Q

pH change in the Vagina one it come in contact with sperm?

  • Upper Vagina
  • Cervix
A
  1. 4.3 ———> 7.2

2. 6 ————> 6.5
Optimal for sperm motility

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15
Q

Passive Sperm Transport occurs via what?

A
  • Testicular fluid
  • Smooth muscle contraction
  • Cilia from seminiferous tubules
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16
Q

What is required for rapid transport of the egg to the uterus?

A

Progesterone

17
Q

Why do men produce sperm throughout their life?

A
  • STEM cells responsible for the production of sperm

- Cells remain viable for the life of the individual

18
Q

Fertilization typically occurs where?

A

In the AMPULLA

19
Q

Function of Sertoli cells

A
  • Support and Maintenance
  • Secrete ESTROGEN, Inhibin and anti-Mullerian factor
  • Maintain Blood Testis barrier
  • Secrete Tubular fluid
  • Phagocytize residual bodies of sperm cells
20
Q

Maturation Phase of Spermatogenesis

A
  • Completion of Flagellum

- Completion of Nuclear Condensation

21
Q

FSH interactions of Sperm Cells

A
  • FSH from AP binds to SERTOLI cells
  • Convert Testosterone to Estrogen
  • Sertoli cells produce androgen-binding protein
  • Sertoli cells produce Inhibin
22
Q

Ex of secondary sexual tissues

A
  • Prostate
  • Penis
  • Ductus Deferens
  • Epididymis
  • Seminal Vesicle
  • Scrotum
23
Q

The immature sperm cells are more located _____ and the mature sperm cells are located _______.

A
  1. In the periphery

2. Towards the Lumen

24
Q

Typical maturation period for Sperm cells in the Epididymis

A

12 days

25
Q

How long does it take the egg to reach the Uterus?

A

3-4 days

26
Q

Stages of Spermatogenesis

A
  1. Primordial Germ cell (2N)
  2. Spermatogonia (2N)
  3. Primary Spermatocyte (2N)
  4. Secondary Spermatocyte (N) x 2
  5. Spermatid (N) x 4
27
Q

Primary vs Secondary Spermatogenesis

A

1:

  • 2N
  • First maturation division (Meiosis 1)

2:
- 1N x 2
- Second maturation division
(Meiosis 2)

28
Q

Isthmus

A
  • Portion of the Fallopian tubes closest to the uterus

- Site of Rapid transport
8 hours

Embryology (7 decks)

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