Gametes and Fertilization

Question 0

Hormone affects on cilia

Answer 0

Estrogen will increase cilia number

Progesterone will increase ciliary beating and egg transport

Question 1

Ampullary-Isthmic Junction

Answer 1

Part of the Fallopian tube where fertilization will occur

Question 2

Hyaluronic Acid

Answer 2

Molecule that holds together the cumulus oophorus/corona radiata

Question 3

Hyaluronidase

Answer 3

Enzyme located on the outer acrosomal cap that dissolves the hyaluronic acid; allows sperm to penetrate the culmulus oophorus to reach the zona pellicida

Question 4

Zona Pellucida

Answer 4

Made up of three glycoproteins; ZP1, ZP2, ZP3

Question 5

Acrosomal reaction

Answer 5

Triggered when ZP3 binds to receptor on sperm. Causes influx of Ca2+ and a rise in pH and cAMP within sperm head. Causes exocytosis of acrosome vessicle

Question 6

Cortical reaction

Answer 6

Ca2+ released from egg causes cortical granules to release enzymes that destroy ZP1,ZP2,ZP3 receptors on the egg

Question 7

Sperm Capacitation

Answer 7

Happen in the vagina. Hyper-activation of tail and some acrosomal proteins removed

Question 8

Fraternal Twins

Answer 8

Two independent sperm
Two independent eggs
dizygotic

Question 9

Identical Twins

Answer 9

Come from same egg and same sperm; egg divides in two

Monozygotic and genetically identical

Question 10

Receptor name on sperm membrane?

Answer 10

GalT

Question 11

What organelle is the Acrosome derived from?

Answer 11

The Golgi

Question 12

Secondary oocyte surrounded by:

Answer 12

1) perivitelline space
2) zona pellucida
3) cumulus oophorus

Question 13

Journey of ejaculated sperm

Answer 13

vagina–>cervix–>uterus–>oviduct–>apullary-isthmic junction