Question
Biology Question on locomotion and movement
The functional unit of contractile system in a striated muscle is
A
sarcomere
B
Z-band
C
cross bridges
D
myofibril
Answer
sarcomere
Explanation
Solution
Sarcomere is the functional unit of myofibril. It contains two types of protein filaments called actin and myosin. These filaments slide upon each other to bring about the contraction of the muscles.