Animal Reproduction

difference between sexual and asexual reproduction

sexual- combines gametes

asexual- w/o gametes

fragmentation

body breaks into pieces, if the pieces grow into new individuals→ reproduction

t/f regeneration leads to reproduction?

false

two species that go throw the budding process?

hydra and sponges

what is budding

new individuals grows from the outer part of existing species

what is parthenogensis

unfertilized eggs devlop into mature adults.

what does sexual reproduction require?

2 haploid gametes to form a diploid zygote

__ fertilization gametes released into the water where fertilization occurs

external

__ fertilization sperm deposited in female reproductive tract, gametes unite

internal

pathway of sperm

seminiferous tubules→ epididymis→ vas deferns→ urethra→ outside of the body

pathway of egg

follicle of ovary→ fallopian tube→ uterus→ cervix→ vagina

pathway of sperm IF egg is fertilized

seminiferous tubules→ epididymis → vas deferns→ urethra→ vagina→ cervix→ uterus → fallopian tube

formation of sperm, is continuous and prolific

spematogenis

devlopment of a mature egg, is a prolonged process

oogenesis

GnRH is secreteted by hypothalamus and directs the release of _& _ from the ant pituitary gland

FSH & LH

two components that estrogens consist of

estradiol and progestrone

hormones contorl of male reproductive.

hypothalmus releases GnRH to ant pituitary→ the the ant pit release FSH stimulates __. LH causes _

sertoli cells (nourish sperm)

leydig cells ( produces testosterone)

testosteone regulates production of GnRH, FSH, LH through _ feedback

negative wh

at hormone does sertoli cells secrete, that reduces FSH from ant pit

inhibin

as the follicle grow in hte ovarian cycle, estrdiol secretion increases, causes FSH and LH and this means _ feedback

positive

what happens when LH levels get very high

ovulation

after ovulation what does the follicle turn into and what does it release

corpus luteum and progesterone

when progesterone and estriol are preventing making an egg by reducing FSH and LH it is now a _ feedback

negative