Chp 27 reproduction

Question 1

4 extra embryinic membranes

Answer 1

Amnion- surrounds amniotic cavity
Chorion - contributes to placenta, secretes HCG
Yolk sac germ cells and blood cells
Allontois - umbillical chord

Question 2

what is the role of the seminiferous tubules?

Answer 2

where sperm is formed

Question 3

what is the role of the epididymus?

Answer 3

where sperm is stored (leaves into vas deferens when ejaculation occurs)

Question 4

what are the 4 typs of asexual reproduction?

Answer 4

Budding- new indviduals spli from existing
Fission- seperation of parent into 2 equal individuals
Fragmentation- breaking body into pieces which develop into adult
Parthenogenesis- development of egg without fertilization

Question 5

what is meiosis?

Answer 5

cell division that results in 4 daughter cells with half the number of chromosomes (haploid)

Question 6

what three sexual structures do both sexes have?

Answer 6

Gonads that produce gametes and secrete hororomones
ducts for transportation
structures for copulation

Question 7

what occurs during menstruation?

Answer 7

3-7 days, uterine lining breaks down. levels of estrogen and progesterone rise as edometrium thickens, levels drop due to no implantation.

Question 8

What occurs during ovulation?

Answer 8

egg is released through follicle, which becomes corpus luteum which produces est. and prog, if fertliziation occurs, embryo prduces HGC which maintains corpus

Question 9

what is the life cycle of sperm?

Answer 9

Spermatogenesis: creation of sperm in seminiferous tubules. Sperm stem cells develop in male embryo. Spermatogonia - primary spermatocytes (diploid) - secondary spermatocytes (Haploid)- spermatids- mature sperm.