Question

When all the muscle fibres are on the same side of tendon, the pennate muscle is :

• A. Multipennate
• B. Unipennate
• C. Single pennate
• D. Lateral pennate

Hint:

Unipennate muscles have fibers attached on one side of the tendon, while bipennate muscles have fibers on both sides.

Answer 1

The Correct Option is B

Concept: Pennate muscles are skeletal muscles in which the muscle fibers are arranged obliquely to the tendon, resembling the structure of a feather. Types of pennate muscles include:
• Unipennate -- muscle fibers are located on only one side of the tendon
• Bipennate -- muscle fibers are arranged on both sides of the tendon
• Multipennate -- multiple rows of fibers are attached to several tendons

Step 1: Understand the arrangement of muscle fibres.
The question states that all muscle fibers are present on the same side of the tendon.

Step 2: Identify the type of pennate muscle.
When fibers are attached on only one side of the tendon, the muscle is called: \[ \text{Unipennate muscle} \] Hence, the correct answer is: \[ \boxed{(B)\ \text{Unipennate}} \]