A Series of Events Occur During Fertilization

question 50

Multiple Choice

A series of events occur during fertilization.Place the following events in the proper order in which they occur.
a.The "slowblock" occurs.
b.A single nuclear envelope surrounds both sperm and egg pronuclei.
c.The acrosomes of sperm release digestive enzymes that allow the sperm to pass through the zona pellucida to the egg plasma membrane.
d.Sperm cover the surface of the egg and secrete enzymes that help weaken the corona radiata.
e.Pronuclei are formed.
f.The "fast block" occurs.
g.Microvilli bring the entire sperm into the egg.
h.Sperm squeeze through the corona radiata and bind to the zona pellucida.

• A)a,e,b,d,f,c,g,h
• B)d,h,c,f,a,g,e,b
• C)d,b,g,a,f,c,e,h
• D)f,a,d,h,c,g,e,b
• E)e,d,h,c,a,f,b,g

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Definitions:

Oral

Pertaining to the mouth or taken through or applied in the mouth, often used in the context of medications or narrations.

Rectal

Related to the rectum, the final section of the large intestine, terminating at the anus.

Pasteurization

A heat treatment process applied to food and drinks to kill harmful microorganisms and extend shelf life without significantly altering the taste or nutritional value.

Sterilizing (Autoclave)

A process of killing all microorganisms, including spores, on tools or equipment by using high pressure and steam in a device known as an autoclave.