Chapter 11 Muscle Anatomy

Question 1

Antagonist

Answer 1

Agent that has an opposing effect or works against another agent.

Question 2

Fixator muscle

Answer 2

Muscle that functions as a joint stabilizer.

Question 3

Prime mover

Answer 3

Main muscle responsible for producing a particular movement.

Question 4

Synergistic

Answer 4

Muscle that assists a prime mover.

Question 5

Origin

Answer 5

Attachment of a muscle to the bone, which does not move when contraction occurs.

Question 6

Insertion

Answer 6

Attachment of a muscle to the bone that it moves when contraction occurs.

Question 7

Aponeurosis

Answer 7

Broad, flat sheet of connective tissue.

Question 8

Each muscle is…

Answer 8

An organ, mostly made of skeletal muscle tissue.

Question 9

Endomysium

Answer 9

Covering of individual muscle fibers/cells.

Question 10

Fascicles

Answer 10

Bundles of skeletal muscle fibers/cells.

Question 11

Perimysium

Answer 11

Surrounds each fascicle.

Question 12

Epimysium

Answer 12

Surrounds the whole muscle.

Question 13

The four parts of a lever system are:

Answer 13

1. A rod or bar (bone)
2. A fixed point or fulcrum (joint) around which the rod moves
3. A load or resistance that is moved
4. A force or pull to produce movement (muscle contraction)

Question 14

Carpal tunnel

Answer 14

Caused by pressure on the median nerve and from an inflamed tendon sheath.
S/S limited movement, weakness, pain, tingling.
Treatment rest, NSAIDs, surgery.