Embroyology

Question 1

pre embroyonic period

Answer 1

0- 2 wks

Question 2

embroyonic period

Answer 2

3- 8 wks

Question 3

fetal period

Answer 3

9 wk till birth

Question 4

primordial germ cell formed from where and when

Answer 4

epiblast from 2nd week

Question 5

pgc migrates to yolk sac at

Answer 5

4th week

Question 6

pgc reach gonads at

Answer 6

5th week

Question 7

pleuripotent vs totipotent vs multipotent

Answer 7

1. all germ cell layers–> a new organism
2. an embroyo with extraembroyonic tissue
3. more than one category of cells

Question 8

teratoma cell of origin and examples

Answer 8

pgc
craniopharyngeal
sacrococcygeal

Question 9

fate of corpus luteum if no fertilisation

Answer 9

albicans

persists for 14 days and shrink 3-4 days before menstruation–> corpus albicans

Question 10

fsh target and action

Answer 10

theca and granulosa cells
secrete estrogen and progesterone

Question 11

lh surge timeline from beginning to peak
fsh peak when

Answer 11

lh surge begins 36 hrs before ovulation, peaks at 12 hrs before

fsh peAk ; 12 hrs prior but always less than LH

Question 12

WHAT IS SPERMIOGENESIS

Answer 12

REARRANGEMENT OF ORGANELLES TO FORM ACROSOMAL CAP, TAIL, CYTOPLASM SHEDDING

Question 13

NO. OF SPERMATIDS FROM 1 SPERMATOGONIUM

Answer 13

64 TO 512

Question 14

SPERMATOGENESIS IS COMPLETED IN HOW MANY DAYS

Answer 14

74> 64 > 60

Question 15

IN MALES MEIOSIS OCCURS IN

Answer 15

SEMINIFEROUS TUBULES

Question 16

SPERM MATURATION OCCURS IN

Answer 16

EPIDIDYMIS

Question 17

MOST FERTILE PERIOD IN MENSTRUAL CYCLE AND WHY

Answer 17

3 DAYS –> 2 DAYS BEFORE OVULATION AND 1 DAY AFTER

SPERM VIABLE FOR 48 HRS
SECONDARY OOCYTE FOR 24 HRS

Question 18

HOW TO DETECT TIME OF OVULATION

Answer 18

LH PATCH - DETECTS LH SURGE, CHANGES COLOUR

Question 19

HEAD OF SPERM FROM

Answer 19

NUCLEUS

Question 20

SPERM ACROSOMAL CAP FROM

Answer 20

GOLGI APPARATUS

Question 21

fertilisation occurs in

Answer 21

AMPULLA

Question 22

ENZYMES OF ACROSOMAL REACTION

Answer 22

ACROSIN
ACID PHOSPHATASE
HYALURONIDASE

Question 23

PROCESS AND PURPOSE OF CORTICAL REACTION

Answer 23

ON SPERM PENETRATION THROUGH ZP CORTICAL GRANULES INSIDE 2 OOCYTE RELEASE ENZYMES –> CHANGE IN PERMEABILITY OF ZP

PREVENTS POLYSPERMIA

Question 24

TIME OF ZYGOTE FORMATION

Answer 24

12- 24 HRS AFTER OVULATION

Question 25

CELLULARITY OF EMBROYO ENTERING UTERUS AND TIME AFTER FERTILISATION

Answer 25

32 ADVANCED MORULA 4 TH DAY AFTER

Question 26

CAVITATION OCCURS IN

Answer 26

ADVANCED MORULA

Question 27

MAXIMUM CELLULARITY OF TOTIPOTENT CELLS

Answer 27

8 CELLS

Question 28

COMPACTION OCCURS AFTER

Answer 28

8 CELLED STAGE

Question 29

BLASTOCYST FORMED WHEN

Answer 29

4 - 5 DAY POST FERTILI

Question 30

PLACENTA DERIVED FROM

Answer 30

TROPHOBLAST OR OUTER CELL MASS

Question 31

EMBROYO DERIVED FROM

Answer 31

INNER CELL MASS OR EMBROYOBLAST

Question 32

BLASTOCYST CELLULARITY

Answer 32

58

Question 33

FUNCTIONS OF ZONA PELLUCIDA

Answer 33

1. PREVENTS POLYSPERMY 2. PREVENTS IMPLANTATION

Question 34

HATCHING OF BLASTOCYST OCCURS AT

Answer 34

5TH DAY AFTER FERTILI

Question 35

TIMELINE OF IMPLANTATION

Answer 35

BLASTOCYST STARTS FROM 6-7 TH DAY ENDS BY 10TH - 11TH DAY

Question 36

CELLULARITY AT TIME OF IMPLANTATION

Answer 36

100- 250

Question 37

HARTMAN'S SIGN

Answer 37

BLEEDING AT IMPLANTATION.

Question 38

SITE OF IMPLANTATION

Answer 38

UPPER PART OF POSTERIOR WALL OF UTERINE CAVITY DEEP LAYER OF DECIDUA

Question 39

FIRST SIGN ON USG

Answer 39

INTRA DECIDUAL SIGN SHOWS GESTATIONAL SAC

Question 40

MC SITE OF ECTOPIC PREGNANCY

Answer 40

AMPULLA