Question

Type of muscle present in our

• A. Upper arm is smooth muscle and fusiform in shape
• B. Heart is voluntary and unstriated smooth muscle
• C. Intestine is striated and involuntary
• D. Thigh is striated and voluntary

Answer 1

The correct option is D Thigh is striated and voluntary

1. Upper arm possesses skeletal muscles and hence they are striped or voluntary muscles with the muscle fibres being cylindrical.

2. Heart comprises of cardiac muscles which are striated in appearance but involuntary in their function. These muscles fibres are fused and contract as a unit.

3. The muscles of intestine being a part of alimentary canal are involuntary but not striped. Added, involuntary muscle fibres are fusiform in shape.

4. The skeletal muscles of thigh are striated and under voluntary control for the locomotion to occur.

So, the correct option is 'Thigh is striated and voluntary'.