Week 2

Question 1

Muscles have different

Answer 1

shapes and fiber arrangements

Question 2

Cross section diameter

Answer 2

The bigger the diameter = greater force exertion

Question 3

Longer muscles can…

Answer 3

shorten through a greater range

Question 4

2 major fiber arrangements

Answer 4

Parallel and Pennate

Question 5

Describe Parallel muscles

Answer 5

fibers arranged parallel to muscle

Have a greater range of movement than pennate arrangements

Question 6

Parallel Muscle Categorize

Answer 6

Flat
Fusiform 
Strap
Radiate
Sphincter or Circular

Question 7

Pennate Muscles

Answer 7

have shorter fibers to parallel
arranged like a feather
arrangement increases the cross sectional are of the muscle so more power

Question 8

Pennate Muscle Categorize

Answer 8

Unipennate
Bipennate
Multipennate
(if pennate is in the word, its a pennate muscle)

Question 9

Muscle tissue: Skeletal Muscle has 4 Properties

Answer 9

Irritability or excitability
Contractility
Extensibility
Elasticity

Question 10

Irritability or Excitability

Answer 10

property of muscle being sensitive or responsive to chemical (nerve), electrical, or mechanical stimuli

Question 11

Contractility

Answer 11

Ability of muscle to contract and

develop tension or internal force against resistance ; when stimulated

Question 12

Extensibility

Answer 12

Ability of muscle to be stretched beyond resting length

Question 13

Elasticity

Answer 13

ability of muscle to return to original length after stretching

Question 14

When you stimulate a muscle…

Answer 14

it contracts and produces force

Question 15

When a muscle contracts…

Answer 15

one end will only move

Origin and assertion

Question 16

Contraction

Answer 16

a muscle becomes tense due to stimulus

Question 17

muscle contraction also means

Answer 17

muscle action

Question 18

Isometric Contraction

Answer 18

the muscle stays the same length

joint angles remain constant

Question 19

Types of Muscle contractions

Answer 19

Isometric

Isotonic

Question 20

Isotonic

Answer 20

Concentric

Eccentric

Question 21

Isotonic Contractions

Answer 21

muscle tension to cause or control movement

Question 22

Passive Movement

Answer 22

movement without any muscle contraction

due to external force

Question 23

Eccentric Contraction

Answer 23

muscle lengthening under tension
force from muscle is weaker than resistance
(still controlled)

Question 24

Concentric Contraction

Answer 24

muscle shortens under tension

force from muscle is greater than resistance

Question 25

Isokenetics

Answer 25

type of exercise using concentric/eccentric

speed or velocity is the same

Question 26

Agonist Muscle

Answer 26

primary or prime movers

most involved muscles

Question 27

Antagonist muscles

Answer 27

located on opposite side of joint

opposite concentric action (relax)

Question 28

Stabilizers

Answer 28

Surround joint or body part

“fixators”

Question 29

Synergist

Answer 29

assist in action of agonist

not prime movers

Question 30

Neutralizers

Answer 30

prevent unwanted contractions and fluctuations

Question 31

3 Cardinal planes of motion

Answer 31

Sagittal PLane
Frontal Plane
Transverse Plane

Question 32

Sagittal plane

Answer 32

divides body down the middle

left and right half

Question 33

Frontal Plane

Answer 33

divides body into anterior and posterior halves

Question 34

Transverse Plane

Answer 34

divides body into superior and inferior halves

Question 35

Axes of Rotations

Answer 35

Mediolateral Axis
Anteroposterior Axis
Longitudinal Axis

Question 36

Mediolateral Axis

Answer 36

runs side to side (like frontal plane)

right angle with Sagittal plane

Question 37

Anteroposterior Axis

Answer 37

runs front to back (like sagittal plane)

right angle with frontal plane

Question 38

Longitudinal Axis

Answer 38

Runs up and down head

right angle with transverse plane