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Human Rep. 15.1-15.5

IGCSE Human Reproduction 15.1 - 15.5

QuestionAnswer
What are Gametes and name 2? sex cells. men:sperm. Women:egg/ovum.
Another word for sperm and where is it produced? spermatozoa. In the testes.
What do prostate gland secrete and why? Secrete fluids like mucus to help sperm cells swim.
What is an acrosome and its function? located at the tip of the sperm and it releases enzymes to penetrate the egg's wall.
What secretes oestrogen and what for? by follicle in ovary to thicken the lining of the uterus, waiting for implantation.
What secretes progesterone and what for? by yellow body in ovary to maintain lining of uterus.
What is the outer opening of the vagina called? vulva.
Name the ring of muscles at the opening of the uterus? cervix.
Where does fertalisation occur and what is formed? in the oviduct and zygote is formed.
What is Mitosis? Nuclear division that occurs during growth.
Cell division forms a what? and what is the process that happens after? forms embryo followed by implantation.
What is a gestation period? pregnancy, between fertalisation and birth, 9 months.
What is the placenta and its role? Formed from embryonic tissue, contains villi for diffusion of food, oxygen and waste materials between mum and fetus.
What would happen if the blood of the fetus and its mum mix? mother's high pressure blood flow would damage the fetus' vessels, different blood group would cause clotting.
What joins the placenta to the fetus and contains artery and veins? the umbilical cord.
Describe the function of the amniotic sac? a membrane containing amniotic fluid, supports and protects fetus from mechanical damage.
What nutrients are needed for women during pregnancy and why? calcium for fetus bones, iron for blood cells to carry food, carbohydrate for energy to carry fetus, protein for fetus' growth.
What is passive immunity? the child has its mother's antibodies in its blood, usually through breast feeding.
What does it mean when women go into labour? oxytocin hormone (from pituitary gland) stimulate uterus to contract.
What releases energy in cells? mitochondria
Created by: hin_hoang
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