Why Is the Head of a Sperm Covered with a Sac

question 67

Multiple Choice

Why is the head of a sperm covered with a sac of 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 "shell" surrounding 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 to compete with.
• D)The enzymes are gradually released into the sperm, where they break down sugars, releasing the energy needed to power sperm movement.

---

Definitions:

Food

Any nutritious substance that people or animals eat or drink or that plants absorb in order to maintain life and growth.

Semistarvation Diet

A diet that provides insufficient caloric intake to maintain normal body functions, often leading to severe physical and mental health consequences.

Anorexia Nervosa

Anorexia Nervosa is an eating disorder characterized by an intense fear of gaining weight and a distorted body image, leading to severe restriction of food intake.

Dieting

The practice of eating and drinking in a regulated manner to achieve or maintain a controlled weight.