Muscle and Muscular System

Question 1

Only pull, never pushes

Answer 1

Muscles

Question 2

Major responsibility for producing specific movement

Answer 2

Prime mover (agonist)

Question 3

Opposes or reverses particular movement

Answer 3

Antagonist

Question 4

Helps prime movers
Adds extra force to same movement
Reduces undesirable or unnecessary movement

Answer 4

Synergist

Question 5

Synergist that immobilizes bone or muscle’s origin
Gives prime mover stable base on which to act

Answer 5

Fixator

Question 6

Muscle that crosses front of joint causes:
Ex. Pectoralis major

Answer 6

Flexion

Question 7

Muscle that crosses back of joint causes:
Ex. Latissimus dorsi

Answer 7

Extension

Question 8

Muscle that crosses lateral side of joint causes:
Ex. Latissimus dorsi

Answer 8

Abduction

Question 9

Muscle that crosses the medial side of joint causes:
Ex. Teres major

Answer 9

Adduction

Question 10

Bundles of muscle fibers

Answer 10

Fascicles

Question 11

Fascicles arranged in concentric ring (circular)

Answer 11

Circular fascicle

Question 12

Broad origin; fascicles converge toward single tendon insertion

Answer 12

Convergent fascicle

Question 13

Fascicles parallel to long axis of straplike muscle

Answer 13

Parallel fascicle

Question 14

Spindle-shape muscles with parallel fibers

Answer 14

Fusiform fascicle

Question 15

Short fascicles attach obliquely to central tendon running length of muscle
Three forms: Unipennate, bipennate, multipennate

Answer 15

Pennate fascicle

Question 16

Dense irregular connective tissue surrounding entire muscle; may blend with fascia

Answer 16

Epimysium

Question 17

Fibrous connective tissue surrounding fascicles

Answer 17

Perimysium

Question 18

Fine areolar connective tissue surrounding each muscle fiber

Answer 18

Endomysium