Results and stats for "Fertilisation"
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Related quizzes
Most correctly guessed answers
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The vagina has an [...] pH.
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acidic
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100.0%
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What characteristic of the vagina makes it hostile so sperm?
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Acidity
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100.0%
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[...]% of semen ejaculated into the vagina is retained around the cervix.
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1
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100.0%
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What are some nutritional factors contained in semen?
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Fructose, sorbitol
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100.0%
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What is the purpose of the fructose and sorbitol found in semen?
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Nutritional factors for sperm
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100.0%
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What is the purpose of the reducing agents found in semen?
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Protect sperm from oxidation when exposed to atmospheric oxygen
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100.0%
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What are the hormones contained in semen which may stimulate muscular activity in the female tract?
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Prostaglandins
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100.0%
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What is the suggested purpose for the prostaglandins found in semen?
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Stimulate muscular activity in the female tract
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100.0%
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How does the consistency of semen change upon ejaculation?
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Coagulates
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100.0%
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How does sperm protect itself from the acidity of the vagina?
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Semen is alkaline
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100.0%
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[...] is present in high concentrations in semen and serves as food for sperm.
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Fructose
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100.0%
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Which hormones does semen contain?
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Prostaglandins (PGE and PGFα)
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100.0%
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When analysing semen, which 4 factors are investigated?
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Volume of ejaculate, sperm density, motility, and morphology
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100.0%
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In normal semen, ejaculate volume should be >[...] ml.
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1.5
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100.0%
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In normal semen, spermatozoa motility should be >[...]% progressively motile.
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40
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100.0%
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In normal semen, spermatozoa morphology should be >[...]% normal.
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4
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100.0%
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At ovulation, is cervical mucus thin or thick?
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Thin
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100.0%
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Right after menstruation, is cervical mucus thin or thick?
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Thick
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100.0%
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[...] is the fertilization of a single ovum by several spermatozoa.
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Polyspermy
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100.0%
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What is another name for the oviducts?
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Fallopian tubes
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100.0%
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In the absence of ovulation, what happens to the spermatozoa in the oviduct?
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Bind to epithelial cells at the isthmus and become immotile
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100.0%
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In the presence of ovulation, what happens to the spermatozoa in the oviduct?
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Travel to the site of potential fertilization at the ampullary-isthmic junction
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100.0%
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Where in the Fallopian tubes does fertilization normally occur?
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Ampullary-isthmic junction
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100.0%
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Capacitation is an activation of spermatozoa triggered by the influx of [...] ions.
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Ca2+
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100.0%
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Which 2° messenger is increased in spermatozoal capacitation?
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cAMP
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100.0%
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Where does the Ca2+ which triggers spermatozoal capacitation come from?
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Uterus
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100.0%
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What happens to the cholesterol stores of the spermatozoon when it goes through capacitation?
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Loss
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100.0%
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What happens to the coating of glycoproteins on the spermatozoon when it goes through capacitation?
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Loss
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100.0%
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The [...] is the process that the spermatozoon goes through when it contacts the zona pellucida of the oocyte, facilitating penetration.
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acrosome reaction
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100.0%
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The acrosome reaction is triggered around the spermatozoon interacting with the [...] protein on the zona pellucida of the oocyte.
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ZP3
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100.0%
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The acrosome reaction exposes the inner acrosomal membrane of the spermatozoon, on which are located [...] enzymes which digest a path through the zona pellucida of the oocyte.
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proteolytic
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100.0%
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What does the proteolytic enzymes expressed on the inner acrosomal membrane of the spermatozoon do to the oocyte?
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Digest a path through the zona pellucida of the oocyte
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100.0%
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Once the spermatozoon has fused with the oocyte, there are several spikes of [...] ion entry into the oocyte.
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Ca2+
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100.0%
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Once it had been fertilized, an oocyte is called a [...].
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zygote
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100.0%
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An oocyte is fertilized while it is arrested around the [...]phase of its [...] m[...]tic division.
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meta, 2nd, eio
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100.0%
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Ca2+ entry into the oocyte after fertilization triggers the release of [...] which prevent polyspermy.
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cortical granules
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100.0%
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What happens to the male pronucleus after fertilization (2)?
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Chromatin decondenses and protamines are replaced by histones
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100.0%
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Where in the male genital tract do spermatozoa finish maturing?
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Epididymis
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100.0%
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Spermatozoal maturation in the epididymis is dependent on which hormones?
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Androgens
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100.0%
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Through which 2 fluids do androgens arrive in the epididymis?
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Via lymph and testicular fluid
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100.0%
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Where in the body is seminal fluid produced?
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Prostate
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100.0%
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What are the 2 components of semen?
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Seminal fluid and spermatozoa
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100.0%
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The level of which subunit of hCG is measured to verify a pregnancy and why?
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β because it is unique to hCG while α subunit is shared with LH, FSH, and TSH
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100.0%
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Which organism in the vagina causes its pH to become acidic?
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Lactobacilli
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0.0%
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What are some reducing agents contained in semen?
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Ascorbic acid, hypotaurine, ergothionine
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0.0%
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Coagulated semen in the female tract will dissolve within [...] minutes.
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60
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0.0%
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Ejaculate is generally [...] ml.
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5
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0.0%
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In normal semen, spermatozoa density should be >[...] sperm/mL.
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15*10^6
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0.0%
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What is the swimming speed of spermatozoa?
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5 mm/min
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0.0%
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What is a characteristic of cervical mucus which is conducive to fertilization that can be observed microscopically?
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Ferns on drying
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0.0%
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What does the ovum release to prevent polyspermy?
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Cortical granules
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0.0%
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What are 3 other names for the Fallopian tubes?
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Oviducts
Uterine tubes
Salpinges
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0.0%
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[...] is an activation of spermatozoa triggered by Ca2+ influx which occurs about 4 hours after ejaculation.
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Capacitation
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0.0%
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What are the 2 distinguishing characteristics of a capacitated spermatozoon?
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Hyperactivated motility and responsiveness to signals from the oocyte
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0.0%
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Once the spermatozoon have digested a path through the zona pellucida, it undergoes [...] and [...] with the oocyte.
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binding, fusion
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0.0%
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Which organelle does the spermatozoon contribute to the zygote?
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Centrioles
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0.0%
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Which organelles does the oocyte contribute to the zygote?
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All but centrioles
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0.0%
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[...], the coming together of the gametic chromosomes, is the final phase of fertilization.
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Syngamy
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0.0%
