Anatomy Ch 6 Test Review

A smooth, sustained contraction is called __:

• a twitch
• fused, or complete tetanus
• unfused or incomplete tetanus
• summing of contractions

Muscles that oppose or reverse a prime mover are termed:

• synergists
• prime movers
• antagonists
• fixators

What is the anatomical term for wide, sheetlike tendons:

• aponeuroses
• fascicles
• epimysiums
• sarcomeres

Endomysium covers:

• fascicles of muscle cells
• an entire muscle 
• myofibrils
• an individual muscle cell

The plasma membrane of a skeletal muscle cell is called the:

• sarcoplasm
• myofilament
• sarcolemma
• sarcomere

In order to excite a muscle cell, ACh must:

• enter the muscle cell by endocytosis
• travel into the axon terminal of the nerve by endocytosis
• break down acetylcholinersterase in the synaptic cleft
• bind to receptors in the sarcolemma of the muscle cell

Which of the following is an example of an isometric contraction?

• shaking the head as to say no
• pushing against an immovable wall
• rotating the arm
• bending the elbow

A muscle group that works with and assists the action of a prime mover is a(n):

• antagonist and fixator
• antagonist and synergist
• synergist only
• fixator only

Which is NOT one of the golden rules of skeletal muscle activity?

• muscles pull, not push
• all muscles cross at least one joint
• muscles have at least 3 points of attachment
• the bulk of the muscle lies proximal to the joint it crosses

This is needed in order for the cross bridge to be released to end a muscle contraction:

• ACh
• creatine
• ADP
• ATP