McCumbee - Fertilization And Implantation

Question 1

Normal vaginal pH is ____ to ____-

Answer 1

3. 8

4. 5

Question 2

The physiological changes that an ejaculated spermatozoa must undergo so that it can penetrate and fertilize an oocyte

Answer 2

Capacitation

Question 3

What triggers the acrosomal reaction, which sends the acrosomal hydrolytic enzymes (proacorsin, hyaluronidase, and phospholipase A2) into the zona pellucida to digest a path to the oocyte?

Answer 3

The spermatozoa has cell surface proteins which interact w/ a zona pellucida receptor (ZP3) and causes a rise in the IC calcium, releasing the acrosome.

Question 4

Under the influence of ______, the endometrium differentiates into a structure that is receptive to implantation and capable of sustaining the developing embryo

Answer 4

Progesterone

Question 5

The blastocyst is a a structure that is developed from the morula in the uterus. It consists of which two cell types that end up being what?

Answer 5

Inner cell mass - fetus

Outer layer of trophoblastic cells - responsible for implantation and become the placenta (fetal part)

Question 6

Trophoblast cells secrete proteases which digest the zona pellucida and allow for what to occur?

Answer 6

Implantation