Lab 4 - Reproductive system Flashcards
Head of epididymis
- fluid absorbed, concentrates the sperm
- sperm stimulate to move their tails and become motile
major site of sperm storage
vas deferens
ejaculatory duct
sperm + seminal vesicle fluid travel from the seminal vesicle to the prostatic urethra
where does fertilisation occur?
ampulla of the uterine (fallopian) tube
looking at a section of a testis, under a light microscope, would you be more likely to see primary or secondary spermatocytes and why?
likely to be PRIMARY because secondary have a very short lifespan
spermatogonia are _____ cells and are considered ____-_____.
spermatogonia are stem cells and are considered non-self.
how does the menstrual cycle work in a normal female?
increased FSH
FSH stimulation leads to increased follicular growth
this leads to increased oestrogen
oestrogen threshold reached
switch from -ve to +ve feedback at the pituitary
surge of LH
ovulation
corpus luteum releases progesterone until it regresses
what happens to the females reproductive system when implantation does not occur?
progesterone and oestrogen levels drop and the endometrial lining is lost
what happens to the females reproductive system when implantation occurs?
developing offspring secretes human chorionic gonadotrophin (HCg) which prevents the corpus luteum from disintegrating and stimulates release of progesterone and oestrogen.
what happens to hormone levels when fertilisation occurs?
oestrogen and progesterone levels continue to rise
what factors could contribute to a female having very low hormone levels?
- no enough fat to produce steroid hormones
- anorexia
- no ovaries
- pre-pubescent
- post-menopause
- pituitary tumour affecting HPG
- FEMALE ATHLETE TRIAD SYNDROME
what happens to hormone levels during menopause?
low oestrogen and progesterone leads to less negative feedback on the pituitary and FSH and LH levels will rise as a result
features exclusive to the primordial follicle?
- NO ZONA PELLUCIDA
- surrounded by squamous “follicular” cells
how can you tell a primary follicle apart from a primordial follicle?
a primary follicle will have ZONA PELLUCIDA and also CUBOIDAL GRANULOSA CELLS
When the follicle develops the ______ it is called a secondary follicle
When the follicle develops the antrum it is called a secondary follicle
