Question

Which muscles work in pairs?


A.

cardiac muscles




B.
skeletal muscles




C.
smooth muscles

Answer 1

B. Skeletal muscle
skeletal muscles work in pairs because muscles can only contract (pull) and cannot expand (push).
Skeletal muscles will have a flexor and an extensor.

The flexor bends the joint.
The extensor straightens it out again.

Answer 2

ok i just dont get this

What is the function of skeletal muscles?


A.

to control the movement of internal organs




B.
to control the contractions of the heart




C.
to move bones

Answer 3

C. to move bones

Answer 4

ok how do u know that for sure though

Answer 5

Bones and muscles work like ropes and levers. The muscles can only pull against the bone not push it. So to bend your arm at the elbow, the bicep pulls the lower arm up. To straighten your arm, the triceps pulls the lower arm back out. the muscles have to work in pairs opposite each other to make movement.

Answer 6

ok that makes since thanks