Out of the following which are the parts of mature human sperm?
A. Acrosome
B. Axoneme
C. Ampulla
D. Neck

Options

A. A, B
B. A, B, D
C. C, D
D. A, B, C, D

Answer

To solve the question about the parts of mature human sperm, we will analyze each option provided:

1. **Acrosome (Option A)**:
- The acrosome is a cap-like structure located at the head of the sperm. It is derived from the Golgi apparatus and contains hydrolytic enzymes that help the sperm penetrate the egg's outer membrane during fertilization. Therefore, the acrosome is indeed a part of mature human sperm.

2. **Axoneme (Option B)**:
- The axoneme is the central shaft of the sperm's tail, composed of microtubules arranged in a specific pattern (9+2 arrangement). It plays a crucial role in the motility of the sperm. Thus, the axoneme is also a part of mature human sperm.

3. **Ampulla (Option C)**:
- The ampulla is not a part of the sperm itself; rather, it refers to a region of the female reproductive tract (specifically the oviduct) where fertilization typically occurs. Therefore, the ampulla is incorrect in this context.

4. **Neck (Option D)**:
- The neck of the sperm is a narrow region that connects the head to the middle piece. It contains centrioles and is indeed a part of mature human sperm.

Based on this analysis, the correct parts of mature human sperm from the options provided are:
- A. Acrosome
- B. Axoneme
- D. Neck

Thus, the correct answer is A, B, and D.