Why Does the Tip of a Sperm Contain Enzymes

question 69

Multiple Choice

Why does the tip of a sperm contain enzymes?

• A) The enzymes are used to prevent other sperm from entering the egg after the sperm and egg membranes have fused.
• B) The enzymes are needed to digest a hole in the protective covering of the egg.
• C) The enzymes are released to kill other sperm so that,by the time sperm reach the egg,only a hundred or so remain with which to compete.
• D) The enzymes are gradually released into the sperm,where they break down sugars,releasing the energy needed to power sperm movement.

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Definitions:

Prefrontal Cortex

The front part of the frontal lobe responsible for complex cognitive behavior, decision making, and moderating social behavior.

Amygdala

A tiny brain structure that registers emotions, particularly fear and anxiety.

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The relatively sudden and rapid physical growth that occurs during puberty. Each body part increases in size on a schedule: Weight usually precedes height, and growth of the limbs precedes growth of the torso.