Why Is It Necessary for Many Sperm to Be Present

question 31

Multiple Choice

Why is it necessary for many sperm to be present in order for one to fertilize the egg?

• A) The combined enzymes digest a path through the corona radiata and zona pellucida.
• B) The combined motion of their flagella enables one sperm to push its way into the egg.
• C) A sperm cannot find the egg by itself.
• D) A mass of sperm is necessary to gain entry into the ovary.
• E) A mass of sperm is necessary to open the uterine tube.

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Definitions:

Genetic Disorders

Medical conditions caused by abnormalities in an individual's DNA, often inherited.

Amniocentesis

A medical procedure used in prenatal diagnosis, involving the extraction of a small amount of amniotic fluid for testing.

Couples

Two individuals who are connected or involved with each other in a romantic or significant relationship.

First Trimester Screen

A screening test performed during the first trimester of pregnancy to assess the risk of certain birth defects.