Ch.6

Question 1

Condition occurring when a joint muscle cannot SHORTEN enough to cause full range of motion at both joints it crosses at the
same time

Answer 1

Active insufficiency

Question 2

Role played by a muscle acting to cause a movement

Answer 2

Agonist

Question 3

Role played by a muscle acting to slow or stop a movement

Answer 3

Antagonist

Question 4

Describing a contraction involving shortening of a muscle

Answer 4

Concentric

Question 5

Muscle property enabling tension development by stimulated muscle fibers

Answer 5

Contractile component

Question 6

Describing a contraction involving lengthening of a muscle

Answer 6

Eccentric

Question 7

Time between the arrival of muscle stimulus and tension development by the muscle

Answer 7

Electromechanical delay

Question 8

A fiber that reaches peak tension relatively quickly

Answer 8

Fast twitch fiber

Question 9

Describing a contraction involving no change in muscle length

Answer 9

Isometric

Question 10

A single motor neuron and all fibers it innervates

Answer 10

Motor unit

Question 11

Electric current or voltage produced by a muscle developing tension

Answer 11

Myoelectirc activity

Question 12

Role played by a muscle acting to eliminate an unwanted action
produced by an agonist

Answer 12

Neutralizer

Question 13

Passive elastic property of muscle derived from the muscle
membranes

Answer 13

Parallel elastic component

Question 14

Pattern of fibers within a muscle in which the fibers are roughly
parallel to the longitudinal axis of the muscle

Answer 14

Parallel fiber arrangement

Question 15

Inability of a two-joint muscle to STRETCH enough to allow full
range of motion at both joints at the same time

Answer 15

Passive insufficiency

Question 16

Pattern of fibers within a muscle with short fibers attaching to
one or more tendons

Answer 16

Pennate fiber arrangement

Question 17

Passive elastic property of muscle derived from the tendons

Answer 17

Series elastic component

Question 18

A fiber that reaches peak tension relatively slowly

Answer 18

Slow twitch fiber

Question 19

Role played by a muscle acting to stabilize a body part against
some other force

Answer 19

Stabilizer

Question 20

Eccentric contraction followed immediately by concentric
contraction

Answer 20

Stretch shortening cycle

Question 22

Building in an additive fashion

Answer 22

Summation

Question 23

State of muscle producing sustained maximal tension resulting
from repetitive stimulation

Answer 23

Tetanus

Question 24

Having the ability to stretch or shorten over time

Answer 24

Viscoelastic

Question 25

What tissue is able to actively develop tension?

Answer 25

Muscle tissue

Question 26

Ability to be stretched or increase in length

Answer 26

Extensibility

Question 27

Ability to return to normal resting length following a stretch

Answer 27

Elasticity

Question 28

Ability to respond to a stimulus

Answer 28

Irritability

Question 29

The contractile component of muscle function

Answer 29

Ability to develop tension

Question 30

FV: When resistance/force is negligible, muscle contracts with…

Answer 30

Maximal velocity

Question 31

FV: As the load increases, concentric contraction slows to __ at isometric max

Answer 31

Zero

Question 32

The elasticity of human skeletal muscle is believed to be due primarily to the…

Answer 32

Series elastic component

Question 33

A single muscle cell that is specialized to contract and generate force

Answer 33

Muscle fiber

Question 34

What surrounds a muscle fiber?

Answer 34

Sarcolemma

Question 35

An action potential does not directly excite muscle fibers, but does so through chemical processes

Answer 35

All or None Principle

Question 36

ANP: If another action potential reaches the muscle fibers before they relax, then the muscle fibers contract harder

Answer 36

temporal summation or increased firing frequency or firing rate

Question 37

Motor units are recruited in an orderly process from smallest to largest

Answer 37

Size Principle

Question 38

Force output is changed by either:

Answer 38

Increasing the firing frequency Activating more motor units

Question 39

If lifting heavy weight what twitch fiber is used?

Answer 39

BOTH OF THEM

Question 40

FV: Isometrically, Force and velocity have __ relationship

Answer 40

No

Question 41

Increases as tension increases in the muscle fibers

Answer 41

Angle of pennation

Question 42

FV: Concentrically, Force and velocity have __ relationship

Answer 42

Inverse

Question 43

FV: Eccentrically, Force and velocity have __ relationship

Answer 43

Direct (both increase or decrease)

Question 44

Which muscle action can produce the most force?

Answer 44

Eccentric

Question 45

The magnitude of the force generated by muscle is related to…(Ms,sM)

Answer 45

-the velocity of muscle shortening -the length of muscle when it is stimulated

Question 46

Devices that detect signals

Answer 46

Transducers