Section 3

Question 1

Two types of fiber arrangement

Answer 1

Parallel and oblique (pennate)arrangement

Question 2

Fusiform (p)

Answer 2

Spindle shaped, belly that tapers (biceps, brachioradialis)

Question 3

Strap(p)

Answer 3

Long parallel, entire length of muscle (sartorius)

Question 4

Flat (p)

Answer 4

Thin and broad

Obliques, rectus abdominis

Question 5

Triangular (p)

Answer 5

Flat fan shaped narrow to broad attachment. (Pec major, lats)

Question 6

Rhomboidal (p)

Answer 6

Four sides (probation Teres, rhom)

Question 7

Sphincter (p)

Answer 7

Circular

Question 8

Unipennate (o)

Answer 8

Short fibers, attaching diagonally along length of central tendon. (Tib anterior, biceps Femoris)

Question 9

Bipennate(o)

Answer 9

Fibers run obliquely on both sides from central tendon (rectus Femoris.)

Question 10

Multipennate (o)

Answer 10

Several tendons with fibers running diagonally btwn them (o)

Question 11

Irritability

Answer 11

Ability of muscle I respond to stimulus

Question 12

Contractility

Answer 12

Ability of a muscle to contract and develop tension

Question 13

Tonicity

Answer 13

State of firmness due to nerve stimulation, represents state of readiness for muscle response

Question 14

Innervation

Answer 14

Nerve responsible to provide stimulus to muscle fibers

Question 15

Reversal of muscle action.

Answer 15

Origin attachment point moves while insertion remains fixated
(Elbow flexing while pull ups)

Question 16

Isometric

Answer 16

Muscle contraction: tension, no change in length of muscle/angle of joint

Question 17

Isotonic

Answer 17

Tension develops causing or controlling a joint movement

Question 18

Concentric (isotonic) +

Answer 18

Muscle shortens

“Causing”

Question 19

Eccentric (isotonic) -

Answer 19

Muscle lengthens

“Controlling”

Question 20

Muscle attaches via

Answer 20

Tendons-from one bone to another-

Question 21

The insertion attachment point will typically move -_________

Answer 21

Toward origin attachment point

Question 22

Aggregate muscle group

Answer 22

(muscle group) according to concentric fxn

Question 23

Involved muscle group

Answer 23

The group against the resistance being applied

Question 24

2-step process to find involved muscle group

Answer 24

What movement resistance is causing

What is opposite muscle group

Question 25

Determining why agonist performs its particular actions at joint: FOUR principles

Answer 25

Line of muscle pull
Vector analysis
Joints functional design
Palpation

Question 26

Line of muscle pull

Answer 26

What- joints does muscle cross (origin instertion)
Where-does muscle cross joint (ant,post,med,lat)
How-does muscle cross joint (v,ob,hor)

Question 27

Vector analysis

Answer 27

Insertion(tail) Origin (head)

Question 28

Joints functional design

Answer 28

What planes of motion does joint allow?

Question 29

Palpation

Answer 29

Touch

Question 30

Intrinsic

Answer 30

Muscle located within it belongs solely to body part on which it acts

Question 31

Extrinsic

Answer 31

Originated outside body part on which it acts

Question 32

4 fxns of muscles

Answer 32

Movement, protection, heat production,… ?

Question 33

Joint characteristics

Answer 33

Weight bearing, shock absorption, movement?