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Qbank Flashcards

1
Q

Motility of sperm by

A

Catsper family cations

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2
Q

Sperm Cytoplasm shed as

A

Residual bodies od renauds

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3
Q

Proximal and distal cenriole os sperm form

A

Proximal= spherical structure in neck
Distal=distal end of middle piece(annulus)
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4
Q

Spiral sheath os sperm formed by

A

Mitochondria

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5
Q

Annulus on distal end of sperm is formed by

A

Distal centriole

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6
Q

Leydig cells stimulated by hormone?

A

LH

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7
Q

Stage in which primary spermatocyte is stuck?
When released?

A

Dicytootene/Diplotene
Prophase
/Mieosis 1

Released on puberty

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8
Q

Corpus callousum after non fertilization stays for

A

2 weeks

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9
Q

When does Corpus callous reaches max size in cycle

A

9 days after ovulation

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10
Q

Corpus callosum maintained in pregnancy by ?
Hormone secreaterd by

A

Hcg
Syncitiotrophoblasts

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11
Q

Corpus callosum till when in pregnancy?
What after it?

A

3 to 4 months
Placenta

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12
Q

What is preembryonic stage

A

Initial 2 weeks

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13
Q

16 cell stage ?

A

4th day of frrtilization

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14
Q

Blastocyst at which day

A

5th day

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15
Q

Zona pellucuda dissapears at

A

6th day

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16
Q

Implantation at which day

A

7th

17
Q

Bilaminar disc formation when after fertilization

A

9th day after fertilization
After implantation

18
Q

Formation of extra embryonic mesoderm when

A

12th day of fertilization

19
Q

Fertilization period for ovulation

A

12 to 24 hrs

20
Q

Fertilization duration of sperm after ejaculation

A

24 to 48 hrs

21
Q

Capacitation occurs in

A

Female tract conditioning

22
Q

Capacitaion for?
Lasts for?

A

Penetration in outer layer
7 hrs

23
Q

Acrosomal reaction to penetrate which layer

A

ZP

24
Q

Sperm binds to zp through?(2)
Causes what

A

Glycoprotien ligands zp3 and zp2
Cause acrosomal reaction(release of acrosomal enzymes hyaluronidase acid phosphates acrosin)

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