Unit 2 Muscles

Question 1

Aggregate muscle action

Answer 1

muscles work in groups rather than independently to achieve a given joint motion

Question 2

Muscles named due to

Answer 2

Visual appearance
location
Function

Question 3

Shape & fiber arrangement affects:

Answer 3

Muscle ability to exert force

range through it can exert force

Question 4

Cross section diameter

Answer 4

factor in muscle ability to exert force

greater cross section=greater force exertion

Question 5

2 types fo fiber arrangement

Answer 5

Parallel & pennate

divided by shapes

Question 6

Parallel Muslce

Answer 6

arranged parallet to lenght of muscle

greater ROM than pennate fibers

Question 7

Parallel shapes

Answer 7

Flat
Fusiform
Strap
Radiate
Circular/Sphincter

Question 8

Flat muscle

Answer 8

rectus abdominus

Question 9

Fusiform Muscle

Answer 9

central belly, tapers to tendons on ends

Ex. brachialis, bicep brachii

Question 10

Strap muscle

Answer 10

sartorius

Question 11

radiate muscle

Answer 11

combined arraengment of flat and fusiform

EX. Pectoralis major

Question 12

Circular/Sphincter muscle

Answer 12

orbicularis oris

Question 13

Pennate muscles

Answer 13

shorter fibers
arranged like a feather across tendon
increasd cross section=increased power

Question 14

Unipenate muscle

Answer 14

run obliquely from one side only

Ex. biceps femoris

Question 15

Bipennate Muscle

Answer 15

fiber runs obliquely on both sides of tendon

Ex.rectus femoris

Question 16

Multipennate muscle

Answer 16

fibers run diagnolly along tendon

Ex.Deltoid

Question 17

Strongest Contraction

Answer 17

Bipennate & Unipennate

Question 18

Skeletal muscle tissue properties

Answer 18

Irritability/excitability
Contractility
Extensibility
Elasticity

Question 19

Irritability/Excitability

Answer 19

Property of muscle being sensitive or responsive to stimuli

Ex. electrical

Question 20

Contractility

Answer 20

ability of muscle to contract

Question 21

Extensibility

Answer 21

ability of muscle to be stretched beyond normal length

Question 22

Elasticity

Answer 22

ability of muscle to return to normal length

Question 23

Innervation

Answer 23

segment of nervous system that provides stimlus to muscle fibers in specific area

Question 24

Amplitude

Answer 24

range of muscle fiber length between max and min.

Question 25

Gaster(belly or body)

Answer 25

the meaty part of muscle that increase in diameter

Question 26

Fascia

Answer 26

Sheet of fibrous connective tissue

Question 27

retinaculum

Answer 27

retains tendons close to body

Question 28

origin

Answer 28

attachment closer to midline

Question 29

Insertion

Answer 29

attachement farther away form midline

Question 30

Contraction

Answer 30

Tension is developed in muscle due to stimulus

Question 31

Passive muscle contraction

Answer 31

No joints move

Question 32

Agonist muscle

Answer 32

primary movers

Question 33

Antagonist muscle

Answer 33

act in opposition of agonist muscle

Question 34

Stabilizers

Answer 34

surround joint or body part to stabilize area

Question 35

Synergist

Answer 35

assist in action of agonists

Question 36

Active insufficiency

Answer 36

muscle shorted to point that it cannot maintain tension

Question 37

Passivley insufficiency

Answer 37

opposing muscle becomes stretched to where it cant allow movement

Question 38

Palpation

Answer 38

Using sense of touch to examine muscle