Question

Sperm motility is due to __________.

• A. muscular movement
• B. flagellar movement
• C. ciliary movement
• D. amoeboid movement

Hint:

• The energy required for flagellar movement is provided by ATP generated in the mitochondria concentrated within the sperm's middle piece.

• Both cilia and flagella are extensions of the cell membrane that originate from basal bodies, which are structurally similar to centrioles.

Answer 1

The Correct Option is B

Concept:

• Specialized cells in eukaryotic multicellular organisms exhibit distinct types of movement: itemize

• Amoeboid Movement: Movement accomplished by pseudopodia, seen in specialized immune cells like macrophages and neutrophils.

• Ciliary Movement: Coordinated movement driven by hair-like cilia, seen in respiratory tract linings (trachea) and the fallopian tubes.

• Flagellar Movement: Movement driven by a whip-like flagellum, seen in specific free-swimming unicellular structures or gametes.

• Muscular Movement: Contractile movement of muscle fibers, utilized for skeletal locomotion, heart beating, and peristalsis.
itemize

Step 1: Analyze the structure and locomotion of human sperm
A mature sperm cell (spermatozoon) is structurally divided into a head, neck, middle piece, and a tail.

• The sperm tail is a specialized

flagellum containing an axoneme with a characteristic \(9+2\) arrangement of microtubules.

• The coordinated, undulating lashing of this tail propels the sperm cell through fluid environments to reach the ovum.

Step 2: Identify the correct classification of movement
Since the propulsion of sperm relies directly on the wave-like beating of its tail, this motion represents flagellar movement. This corresponds to option (B).