KA2.1 Gamete production and fertilisation Flashcards
What are gametes
Sex cells produced from germline cell by meiosis
what is the site of sperm production in testes
Seminiferous tubules that links to sperm duct
What is the site of testosterone production
Interstitial cells found in tissue between seminiferous tubules, passed directly into bloodstream
what does sperm require
source of energy to swim and stay motile
How is the motility and viability of sperm maintained
by prostate gland and seminal vesicles that secrete fluids rich in fructose
How is the optimum viscosity maintained for sperm motility
Prostate gland secretes a thin, lubricating liquid containing enzymes
What is the site of ova production
from Germline cells in ovaries `
What do ovaries contain
Immature ova in various stages in development
What is Ovum’s surrounded by
Follicles which secretes the hormone Oestrogen and protects developing ovum
What happens after ovulation (release of ovum)
the follicle develops into corpus luteum
What is Corpus Luteum
hormone that secretes progesterone which causes changes in uterus makes it suitable for implantation
What is fertilisation
When the nucleus of sperm fuses with nucleus of an ovum
What happens during sexual intercourse
sperm is released into vagina and moves through cervix, uterus and into oviducts
what is ovulation
when a mature ova being released into oviduct
What is semen
milky liquid released by males contains sperm and fluid that maintains motility
