Question

In the given diagram of human sperm, identify the functions of the labelled parts a,b and c.

• A. a → Helps in penetration of sperm into ovum.
  b → Helps in movement of sperm.
  c → Provides energy for the movement of sperms into the female reproductive tract.
• B. a → Helps in penetration of sperm into ovum.
  b → Provides energy for the movement of sperm
  c → Helps in movement of sperm.
• C. a → Helps in movement of sperm.
  b → Helps in penetration of sperm into ovum.
  c → Provides energy for the movement of sperm.
• D. a → Provides energy for the movement of sperm.
  b → Helps in movement of sperm.
  c → Helps in penetration of sperm into ovum.

Answer 1

The Correct Option is B

In the given diagram of a human sperm: 

• Part a is the acrosome, which contains hydrolytic enzymes that help the sperm penetrate the outer layers of the ovum during fertilization.
• Part b is the middle piece, which contains numerous mitochondria. These mitochondria generate ATP, providing the energy required for the movement of the sperm.
• Part c is the tail (flagellum), which is responsible for the actual movement or motility of the sperm, propelling it forward toward the ovum.
   

Therefore, the correct matching is:
a → Helps in penetration of sperm into ovum
b → Provides energy for the movement of sperm
c → Helps in movement of sperm

Correct Answer: B

Answer 2

The diagram shows a human sperm with three labelled parts. Let's identify these parts and their functions:

• Label a: This points to the Acrosome, a cap-like structure covering the anterior part of the sperm head. The acrosome contains hydrolytic enzymes (like hyaluronidase and acrosin). Its primary function is to release these enzymes to break down the outer layers of the ovum (zona pellucida and corona radiata), thus helping in the penetration of the sperm into the ovum during fertilization.
• Label b: This points to the Middle Piece of the sperm. This section contains numerous mitochondria arranged spirally. Mitochondria are responsible for cellular respiration and ATP production. Therefore, the function of the middle piece is to provide energy (ATP) for the movement of the sperm's tail.
• Label c: This points to the Tail (or flagellum) of the sperm. The tail is a long, whip-like structure responsible for the motility of the sperm. Its lashing movements propel the sperm through the female reproductive tract. Thus, its function is to help in the movement of the sperm.

Matching these functions with the labels: 

• a → Helps in penetration of sperm into ovum.
• b → Provides energy for the movement of sperm.
• c → Helps in movement of sperm.

Comparing this with the given options, the correct combination is:

a → Helps in penetration of sperm into ovum.
b → Provides energy for the movement of sperm
c → Helps in movement of sperm.