Gametes to pg116

Question 1

Process of sperm going to egg

Answer 1

unsperms flagellum is powered by the energy from the mitochondria and enters through to the vagina, through uterus.

Passage is assisted by muscluar contarctions of uterus wall. Ovum releases chemicals which attract sperm.

Acrosome head swells, relasing digestive enzymes, breaking down zona pellucida-acrosome reaction. (jelly coating surrounding ovum or egg).

Sperm fuses and penetrates membrane surrounding egg. chemicals are relased, causing zona pellcida to thicken preventing any other sperm from entering-Cortical Reaction.

Sperm nucleus which enters the cell fuses with egg nucleus producing fertilsed zygote

Question 2

what is a acrosome

Answer 2

type of lysosme which are digestive enzyme filled sacs, found in the cytoplasm of cell.

Question 3

Ways Female gametes are specialized for their function

Answer 3

Ovum is a large cell which cannot move which is wafted along the oviducts form ovary to uterus by cillaited cells which line tubes and by muscular tubes of the tubes.

Cytoplasm of ovum conatins proteins and lipids reserves for deveopling embryo.

Ovum has zona pellucida which is a jely like coating for protection especially during cortical reaction

Question 4

Ways Male gametes are specilised for their function

Answer 4

Sperm cell is motile and smaller than an egg cell.

Sperm has a long tail flagellum, powered by energy relased by mitochondira

Has acrosome which contain digestive enzyme that brek down zona pellucida.

Question 5

Components of an egg cell

Answer 5

Cytoplasm,
Hapolid Nucleus,
Lysosoems,
follicles cells from ovary
lipid droplets
cell surface membrane

Question 6

Componenets of sperm cell

Answer 6

acrosome,
Nuclues,
Mitrochondrion
Flagellum