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PHSL 410B Repro Lect 10 (94 questions with 100- correct answers)
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PHSL 410B Repro Lect 10 (94 questions with 100- correct answers)
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PHSL 410B Repro Lect10 (94 questions with
100% correct answers)
oocyte ovulated by female must be transported to -
answer ampulla of fallopian tube
________ of fallopian tube sweep ovarian surface and
pick up oocyte and surround by cumulus oophorus
and corona radiate and deposit it into fallopian
tube - answer fimbriae
_______ of fallopian tube move oocyte-cumulus
complex towards uterus to ampulla of fallopian
tube - answer cilia and smooth muscle
__________ million sperm cells are deposited in
vagina at time of male ejaculation - answer 150-
600
______ sperm reach ampullary portion of fallopian
tube within 5 minutes - answer 50-100
,______ of cervix, uterus, and fallopian tube propel
sperm into upper reproductive tract - answer
forceful contractions
_______ of seminal plasma induce further contractile
activity - answer prostaglandins
Capacitation of sperm - answer Physiological
process within the female reproductive tract by
which spermatozoa gain the capacity to fertilize an
oocyte
- sperm penetrate zona pellucida
- removal or modification of protein coat from
sperm cell membranes
Steps in fertilization - answer 1. sperm weaves
past cumulus granulosa cells of corona radiate and
sperm head attaches to zona pellucida
2. sperm cell undergoes acrosomal reaction
3. spermatozoan penetrates through zona
pellucida
4. cell membranes of sperm and oocyte fuse
5. oocyte undergoes rise in intracellular Ca2+
which triggers cortical reaction. This triggers
exocytosis of granules beneath plasma membrane
that release enzymes causing zona pellucida to
harden
, 6. oocyte completes second meiotic division
7. sperm nucleus decondenses and transforms into
male pronucleus
8. male and female pronuclei fuse forming new
cell, the zygote
zona pellucida contains ______ glycoproteins -
answer 3
receptors on plasma membrane of sperm cell bind
to - answer zona protein 3
acrosmal reaction - answer rise in Ca2+ inside
sperm cell triggers exocytosis of the acrosome
which contains hydrolytic enzymes
Acrosomal hydrolytic enzymes - answer dissolve
zona pellucida
mechanical action by whip-like action of tail pushes
the sperm toward - answer oocyte membrane
describe the fusion of sperm and oocyte
membranes - answer microvilli on oocyte
surround the sperm, membrane fuse, and contents
of sperm cell enter the oocyte
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