Question

A cross section at mid point of the middle piece of human sperm will show.

• A. Centriole, mitochondria, $9+2$ arrangement of microtubules
• B. Centriole and mitochondria
• C. Mitochondria and $9+2$ arrangement of microtubules
• D. $9+2$ arrangement of microtubules only

Answer 1

Answer: (C)

Mitochondria and $9+2$ arrangement of microtubules

The sperm is divided into 3 parts, the head, middle piece and the tail. The middle piece of the sperm contains mitochondria that are arranged spirally around the axonema. This axonema has the 9+2 arrangement of the microtubules. The spiral arrangement of the mitochondria is known as the Neubenkern sheath. So, the correct option is 'Mitochondria and 9+2 arrangement of microtubules'9+arrangement of microtubules9+ arrangement of microtubules