Blastopore is
opening of neural tube
opening of gastrocoel
future anterior end of embryo
found in blastula
Location and secretion of Leydig’s cells are
liver-cholesterol
ovary-estrogen
testis-testosterone
pancreas-glucagon
How many sperms are formed from a secondary spermatocyte?
4
8
2
1
Acrosome reaction in sperm is triggered by
capacitation
release of lysin
influx of Na+
release of fertilizing
Egg is liberated from ovary in
secondary oocyte stage
primary oocyte stage
oogonial stage
mature ovum stage
Eye lens is formed from
ectoderm
mesoderm
endoderm
ectoderni and mesoderm
Cells become variable in morphology and function in different regions of the embryo. The process is
differentiation
metamorphosis
organisation
rearrangement
Gonads develop from embryonic
both mesoderm and endoderm
During cleavage, what is true about cells?
nucleocytoplasmic ratio remains unchanged
size does not increase
there is less consumption of oxygen
the division is like meiosis
Middle piece of mammalian sperm posses
mitochondria and centriole
mitochondria only
centriole only
nucleus and mitochondria
