Results and stats for "Fertilisation"

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