Spermatozoa in the female tract

Question 1

ejaculations in vagina occurs in

Answer 1

primates, ruminants, dogs and cats

Question 2

ejaculation is to the cervix or uterus occurs in

Answer 2

rodents, pigs, horses

Question 3

where does fertilization occur?

Answer 3

in the ampulla/isthmus or ampulla-isthmus junction

Question 4

what causes sperm to become immobilized in vagina

Answer 4

vaginal bacteria secretes lactic acid lowering the pH to lower than 5

Question 5

sialomucin

Answer 5

low viscosity, produced in crypts in cervix

Question 6

sulfomucin

Answer 6

thick, viscours mucus, produced at apical portion of crypts

Question 7

phagocytosis

Answer 7

neutrophils an antibodies in vagina and uterus

Question 8

rapid transport

Answer 8

myometrial muscle contractions following copulations

Question 9

sustained transport

Answer 9

sperm that fertilize the oocyte

Question 10

stimulates contractions

Answer 10

estradiol

Question 11

in seminal plasma, increases muscular tone and contractions of uterus and oviduct cells

Answer 11

Prostaglandins

Question 12

capacitation

Answer 12

biochemical event occurring to the sperm plasma membrane that imparts fertilizing ability to the sperm,

Question 13

when does capacitation begin

Answer 13

when sperm are exposed to seminal fluids during the ejaculation

Question 14

uterine/oviductal fluids contain enzymes that

Answer 14

destabilize the sperm plasma membrane by removing cholesterol, carbohydrates and proteins

Question 15

sperm capacitation

Answer 15

changes in sperm membrane

Question 16

sperm motility pattern changes from

Answer 16

linear to hyperactive motility

Question 17

fertilization

Answer 17

fusion of ale and female gametes, process by which haploid gamete, sperm and eggs unite to produce a genetically distinct individual

Question 18

proteins in Zona Pellucida

Answer 18

ZP1,ZP2 and ZP3

Question 19

acrosome reaction

Answer 19

orderly fusion of sperm plasma membrane and the outer acrosomal membrane

Question 20

vesiculation

Answer 20

fusion of sperm plasma membrane an outer acrosomal membrane to form small vesicles, acrosomal contents are liberated

Question 21

dizygotic

Answer 21

fertilization of 2 oocytes by 2 different sperm

Question 22

monozygotic

Answer 22

a fertilized oocyte splits into 2 zygotes very early, same sex and exactly the same chromosomes

Question 23

vitelline block

Answer 23

the vitelline membrane itself becomes refractory to sperm attachment

Question 24

What allows for oocyte transport in oviduct

Answer 24

oviduct secretions, contractions of smooth muscle, beating of cilia