Muscular System

Question 1

Each muscle cell consists of ______, which are made up of smaller units called sarcomeres.

Answer 1

Myofibrils

Question 2

What must be present for a muscle cell to contract?

Answer 2

Calcium and adenosine triphosphate (ATP)

Question 3

What muscles make up the skeletal system?

Answer 3

Skeletal muscles or voluntary muscles – under conscious control

Question 4

How do skeletal muscles work in pairs?

Answer 4

Prime mover – execute a given movement, antagonist – muscle produces the opposite movement. Others known as synergist – work in cooperation with the prime mover.

Question 5

Flexors

Answer 5

Reduce the angle at the joint

Question 6

Extensors

Answer 6

Increase the angle

Question 7

Abductors

Answer 7

Draw a limb away from the midline

Question 8

Adductors

Answer 8

Return the limb back toward the body

Question 9

Muscle contraction results from the sliding together of what filaments within the muscle cell or fiber?

Answer 9

Actin and myosin filaments