rando test two questions from all topics Flashcards
(37 cards)
what is the average length of the human gestational period
38 weeks
the fertilisation age is how many weeks before mentraul age
2 weeks
at which stage of embryo development does it implant into the uterus
when it is a blastocyst
which process occurs in the third week causes the transformation of the embryonic disk to the trilaminar sdisk
gastrulation
which germ layer does respiratory epithelium derive from
endoderm
which directions does embryo folding occur
crania-caudally and lateral
what risk does cytomegalovirus have on the foetus
it can cause cerebral calcification
what induces the ectoderm to thicken to form the neural plate
the notochord
failure of fusion of the anterior notochord causes what
anencephaly
where is fertilisation most likely to occur
in the ampulla
fertilisation age occurs in three stages what are they
early
embryonic
foetal
following cleavage and fertilisation what is the formation called
blastocyst
what chemical process must occur for the sperm to enter the ovum
acrosome reaction occurs in the sperm to allow it to penetrate the zone pellucida
which groups of cells forms the embryo proper
epiblast cells
which germ layer derives all epithelial linings
endoderm
neuraltion is initiated by which structure
notochord
why does embryonic folding occur
due to the increasing weight of the amniotic cavity
where does neural folding first occur
in the cervical region
which orgasnims causes dysentary
entamoeba histolytica
which parasite transmits plasmodium falciparum to humans
mosquitos
what type of parasitic worms are flat and unsegmented
trematodes (flukes) eg schistosome haematobium
what is the intermediate host for the tapeworm taenia solium
pig
what sort of orgasnim causes athletes foot
fungus
what is the basic structure of a virus
protein coat with protein core with nucleic acid can be DNA or RNA
