Deck 1: Gametogenesis and Fertilization

Question 1

________ Blastocystic cavity

A)A
B)B
C)C
D)D
E)E

Answer 1

C
The blastocystic cavity forms as fluid passes into the morula from the uterus and accumulates.The spaces around the central cells of the morula coalesce to form the blastocystic cavity,converting the morula into a blastocyst.The uterine fluid in the blastocystic cavity bathes the ventral surface of the embryoblast and probably supplies nutrients to the embryonic cells.

Question 2

________ Contains enzymes that digest a path for the sperm

A)Polar body
B)Capacitation
C)Acrosome
D)Zona pellucida
E)Pronuclei

Answer 2

C
The acrosome is a caplike structure that invests the anterior half of the head of the sperm.It contains enzymes that pass through perforations in its wall and digest a path for the sperm to follow through the zona pellucida to fertilize the oocyte.

Question 3

________ Derived from a primary oocyte

A)A
B)B
C)C
D)D
E)E

Answer 3

B
The secondary oocyte is derived from a primary oocyte after the first meiotic division.This division produces two haploid cells,the secondary oocyte and the first polar body.By the time of ovulation,the secondary oocyte has begun the second meiotic division but progresses only to the metaphase stage,where division is arrested.If the oocyte is fertilized,it completes the division,forming a mature oocyte.

Question 4

________ Degenerates and disappears

A)A
B)B
C)C
D)D
E)E

Question 5

________ Zona pellucida

A)A
B)B
C)C
D)D
E)E

Question 6

________ Produces progesterone

A)A
B)B
C)C
D)D
E)E

Question 7

________ Changes occur in it that inhibit entry of sperm

A)Polar body
B)Capacitation
C)Acrosome
D)Zona pellucida
E)Pronuclei

Question 8

________ Meiotic spindle

A)A
B)B
C)C
D)D
E)E

Question 9

________ Expelled with the follicular fluid

A)A
B)B
C)C
D)D
E)E

Question 10

________ Polar body

A)A
B)B
C)C
D)D
E)E

Question 11

________ Gives rise to the hypoblast

A)A
B)B
C)C
D)D
E)E

Question 12

________ Cytotrophoblast

A)A
B)B
C)C
D)D
E)E

Question 13

________ Gives rise to part of the placenta

A)A
B)B
C)C
D)D
E)E

Question 14

________ Embryoblast

A)A
B)B
C)C
D)D
E)E

Question 15

________ Fimbriae

A)A
B)B
C)C
D)D
E)E

Question 16

________ Develops under luteinizing hormone influence

A)A
B)B
C)C
D)D
E)E

Question 17

________ Once filled the cavity of the ovarian follicle

A)A
B)B
C)C
D)D
E)E

Question 18

________ Haploid nuclei that fuse to form a zygote

A)Polar body
B)Capacitation
C)Acrosome
D)Zona pellucida
E)Pronuclei

Question 19

________ Corona radiata

A)A
B)B
C)C
D)D
E)E

Question 20

________ Haploid cell

A)A
B)B
C)C
D)D
E)E

Question 21

________ Hypoblast

A)A
B)B
C)C
D)D
E)E

Question 22

________ Embryoblast

A)A
B)B
C)C
D)D
E)E

Question 23

________ Endometrium

A)A
B)B
C)C
D)D
E)E

Question 24

________ Syncytiotrophoblast

A)A
B)B
C)C
D)D
E)E