Q. Which one of the following is correct pairing of a body part and the kind of muscle tissue that moves it?
A) Biceps of upper arm – Smooth muscle fibres
B) Abdominal wall – Smooth muscle
C) Iris – Involuntary smooth muscle
D) Heart wall – Involuntary unstriated muscle
Explanation
[Solution from source] The muscles of the iris that change pupil size are smooth, involuntary muscles. The abdominal wall is moved by skeletal (striated, voluntary) muscles, so pairing it with smooth muscle is wrong; the biceps is also skeletal and the heart wall is striated cardiac muscle. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.