Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Reproduction
MEDSCI 142
| Question | Answer |
|---|---|
| Males | -constant production of spermatozoon &fertility -decreases with age -~300mill/day |
| Females | -cyclic ~3days/month -7mill follicles~400ovulated |
| Endocrine glands | -hypothalamus & pituitary(in brain) -adrenal(above kidney's) -gonads |
| gonads | -testis&ovaries -produce gametes -hormones produced |
| Hypothalamus | -homeostatic regulator=temp,hunger,thirst,sleep stress -neuroendocrine=nueral & hormonal info |
| posterior pituitary | release hormones= nuerosecretory peptide hormones (NPH) |
| nuerosecretory nuerons | -conduct nerve impulses -produce, conduct & release NPH -pass into post pituitary |
| Nuerosecretory peptide hormones | -produced in hypothalamus -carrier proteins to axon terminals -stored in secretory vessels -nerve impulses trigger exocytosis=releasing hormones |
| Hormones released? *nuerosecretory peptide hormones* | *oxytocin *antiduiretic hormones |
| Oxytocin | -smooth muscle contraction (milk ejection, contraction of uterus, induces labour) -secreted by stimulation of nipples/uterie distension |
| Antidiuretic hormones | -acts on kidneys=retain water |
| Anterior pituitary | -releasing & inhibiting hormones in cell body into vesicles -nerve impulses=hormones secreted into hypophysealportal vessels |
| hypophysealportal system | blood flows from capillarybed to another without passing through heart |
| Anterior pituitary secretory cells | -releasing & inhibiting hormones act on specific cells -clumps on termini of portal blood vessels -Gonadotrophs- gonadotrophin |
| Gonadotrophins e.g | -FSH follicle stimulating hormone -LH luteinising hormone |
| Pulsatile release | -hypothalamic secretion= discrete burst, prevents receptor desensitations & down regulation |
| FSH | |
| Uterine tubes | -fertilisation in ampulla (1)rich nutritive environment (2)epithelial linin, secretory colunar (3) mucosa surrounded by concentric layers of SM (4)ciliary movement transports |
| Eptopic pregnancy | -fertilisation not in uterine wall -risk factors: smoking, older, prior damage |
| Ovary | -oval 5-10g -3regions -ovarian cortex -centra ovarian medulla -inner hilium |
| Ovarian cortex | -ovarian follicles |
| central ovarian medulla | -ovarian stroma -steriod producing cells |
| Inner Hilium | -point entry for nerves & blood vessels |
| Follicular development | primordial follice-primary follicle-2nd follicle-mature follicle-ovulation-corpus luteum-corpus arlbican-fertilisation |
| Menopause | -end of reproductive life -50-52yrs -ovary runs out of follicles -<1000 follicles |
| Spermatogenesis basics | -sperm production -only in semeniferous tubes -after puberty -300-600sperm/g/testi/sec |
| phases of sperm production | (1)mitotic division (2)meiotic division (3)spermiogenesis *puberty:gem cells activated |
| (1)mitosis | -spermatogonial stem cells divide -form 2n -in basal compartments -move between stertole cells into adluminal compartments->spermatocytes |
| (2)meiotic division | 1 spermatocyte(2n)-2 spermatocyte(n)-spermatid(n l) |
| Spermiogenesis | -cytodifferentiation -spermatids differentiate to spermatozoa -move to lumen - |
Created by:
meglet
Popular Anatomy sets