Arm and leg muscles are arranged in antagonistic pairs. How does this affect their functioning?
a) it provides a backup if one of the muscle is the injured
b) one muscle of the pair pushes while the other pulls
c) it allows the muscles to produce opposing movements
d) it doubles the strength of contraction
Which of the following bones in the human arm would correspond to the femur in the leg?
a) radius
b) ulna
c) tibia
d) humerus
The deep infolding of the muscle fibre membrane is called…..
a) T-tubule
b) Z line
c) sarcoplasmic reticulum
d) sarcomere
Bone dissolving cells are called…….
a) chondrocytes
b) osteocytes
c) osteoblasts
d) osteoclasts
