Muscle System Test Review

Muscles _____, or shorten, pulling on tendons which pull on bones to accomplish movement at _____.

• stretch, origins

• contract, joints

• contract, ligaments

• depress, joints

The muscle _____ is the attachment to the immovable (or less movable) bone.

• hypocenter

• insertion

• origin

• supra

The insertion is the attachment to the _____bone.

• mobile

• immovable

• origin

• jaw

When a muscle contracts, the _____ moves toward the origin.

• muscle

• tissue

• bone

• insertion

Which of the following is NOT a function of muscle tissue?

• producing movement

• maintaining posture

• generating force

• generating heat

• moving substances

Which of the following statements are true about muscle actions?

• muscles can only push, never pull

• all muscles have at least 2 attachments

• muscles cross at least one joint

• None of these

The _____ law states that when stimulated adequately, the muscle cell will contract to its fullest extent; it never partially contracts.

• all or none

• Newtons

• federal

• vastus

______ responses involve different degrees of shortening or contraction and can be produced in 2 ways; by changing frequency of muscle stimulation and by changing the number of cells being stimulated.

• unexpected

• neurological

• involuntary

• graded

How forcefully a muscle contracts depends on how _____cells are stimulated. _____ cells are stimulated when you move a pen than when you swing a baseball bat.

• large, smaller

• many, fewer

• excited, inactive

• calm, excited

Muscle fatigue is caused by the oxygen debt that occurs during prolonged muscle activity. The muscle becomes unable to contract even when stimulated. How long a muscle can work depends largely on blood supply.

• True

• False