Question
Biology Question on Structural Organisation of Animals and plants
Which one of the following is correct pairing of a body part with the kind of muscle tissue present in it?
A
Biceps of upper arm ? Smooth muscle fibres
B
Abdominal wall ? Voluntary smooth muscle
C
Iris? Involuntary smooth muscle
D
Heart wall ? Involuntary unstriated muscle
Answer
Iris? Involuntary smooth muscle
Explanation
Solution
Involuntary smooth muscles are those muscles that are not under the control of our will and are without any striations (stripes). Iris has involuntary smooth muscle. Biceps of upper arm have striated muscle fibres and abdominal wall has involuntary smooth muscles. Heart wall has involuntary striated muscle.