After the fertilization of a sea urchin egg, the influx of which ion prevents polyspermy?Multiple choice question.SodiumChlorideCalciumPotassium

Which of the following macromolecules attracts water into the space between the vitelline envelope and the egg surface, preventing polyspermy in sea urchins?Multiple choice question.HyalinGlucoseCholesterolHyaluronic acid

The “fast block” to polyspermy is due toa) depolarisation of the egg membrane.b) an increase in concentration of Ca 2+ ions.c) fusion of cortical granules with the egg membrane.d) activation of the egg

The slow block to polyspermy is due toa) a transient voltage change across the membrane.b) the consumption of yolk protein.c) the jelly coat blocking sperm penetration.d) formation of the fertilization envelope

Which of the following is involved in the prevention of polyspermy?Multiple Choiceacrosome of the spermdepolarization of the egg's plasma membranefusion of the sperm and egg nucleuschanges within the corona radiatathe number of chromosomes contained within the sperm

In sea urchins, the Blank______ process forms under the sperm's plasma membrane and extends through the Blank______ envelope to the egg's plasma membrane to allow the sperm nucleus to enter the egg.Multiple choice question.polarizing; zona pellucidaacrosomal; zona pellucidapolarizing; vitellineacrosomal; vitelline