Lesson 6

Question 1

motor unit

Answer 1

a motor nerve plus all the muscle fibers it stimulates

Question 2

isotonic

Answer 2

muscle contracts and shortens

Question 3

insertion

Answer 3

part of a muscle that is attached to a movable part

Question 4

intramuscular

Answer 4

into the muscle

Question 5

irritability

Answer 5

ability to react to a stimulus, excitability

Question 6

isometric

Answer 6

muscle tension increases, but muscle does not shorten

Question 7

belly

Answer 7

the central part of a muscle

Question 8

biceps

Answer 8

muscle on front part of upper arm

Question 9

blepharospasm

Answer 9

involuntary muscle contraction of the eyelid, causing blinking

Question 10

contractility

Answer 10

the capacity of a muscle to shorten in response to a stimulus

Question 11

dilator muscle

Answer 11

a muscle that opens or closes an orifice

Question 12

elasticity

Answer 12

capable of returning to original form after being compressed or stretched

Question 13

excitability

Answer 13

ability to respond to stimuli

Question 14

fibromyalgia

Answer 14

chronic muscle pain

Question 15

heel spur

Answer 15

a calcium deposit in the plantar fascia, near its attachment to the calcaneus bone

Question 16

hernia

Answer 16

protrusion of part of an organ through abnormal opening

Question 17

acetylcholine

Answer 17

chemical released when a nerve impulse is transmitted

Question 18

antagonist

Answer 18

a muscle whose action opposes the action of another muscle

Question 19

triceps

Answer 19

three headed muscle on the back of the upper arm

Question 20

muscle fatigue

Answer 20

caused by an accumulation of lactic acid in the muscle

Question 21

muscle spasm

Answer 21

sustained muscle contraction

Question 22

muscle strain

Answer 22

over tearing or stretching of the muscle

Question 23

muscle tone

Answer 23

muscles always in a state of partial contraction

Question 24

muscular dystrophy

Answer 24

muscle disease in which the muscle cells deteriorate

Question 25

myalgia

Answer 25

muscular pain

Question 26

origin

Answer 26

part of the skeletal muscle that is attached to the fixed part of the bone

Question 27

plantar fasciitis

Answer 27

inflammation of the plantar fascia on the sole of the foot

Question 28

prime mover

Answer 28

muscle that provides movement in a single direction

Question 29

rehabilitation

Answer 29

the process of restoring function through therapeutic exercise

Question 30

remission

Answer 30

a long term disappearance of symptoms of a disease

Question 31

sarcolemma

Answer 31

muscle cell membrane

Question 32

sarcoplasm

Answer 32

the hyaline or finely granular interfibrillar material of muscle tissue

Question 33

shin splints

Answer 33

injury to the muscle tendons in front of the skin

Question 34

smooth muscle

Answer 34

non striated, involuntary muscle

Question 35

sphincter muscle

Answer 35

circular muscle such as the anus

Question 36

strain

Answer 36

tear in a muscle

Question 37

strength

Answer 37

capacity to do work

Question 38

synergists

Answer 38

muscles that help steady a joint

Question 39

tennis elbow

Answer 39

inflammation of the tendon that connects the arm muscles to the elbow

Question 40

action potential

Answer 40

the electric exchange occurring across the membrane of a nerve or muscle cell during transmission of a nerve impulse

Question 41

all or none law

Answer 41

law that states a muscle cell, when stimulated, contracts all the way or not at all

Question 42

dystonia

Answer 42

characterized by involuntary muscle contractions tat cause repetitive movements or abnormal posture

Question 43

extensibility

Answer 43

the ability to lengthen (stretch) and hence increase the distance between two parts

Question 44

myasthenia gravis

Answer 44

disease in which there is abnormal weakness and eventual paralysis of muscles

Question 45

neuromuscular junction

Answer 45

point between the motor nerve axon and the muscle cell membrane

Question 46

physiotherapy

Answer 46

treatment of disease and injury by physical means using light, heat, cold, water, electricity, massage, and exercise

Question 47

rotator cuff injury

Answer 47

an inflammation of a group of tendons that fuse together and surround a shoulder joint

Question 48

tetanus

Answer 48

infectious disease, usually fatal, characterized by spasm of voluntary muscles and convulsions caused by a toxin from tetanus bacillus

Question 49

torticollis

Answer 49

a contracted state of the neck muscles that produces an unnatural position of the head; also called wryneck

Question 50

vastus lateralis

Answer 50

muscle found on anterior of thigh, used as an injection site for intramuscular injections

Question 51

dilator muscles

Answer 51

a muscle that opens or closes an orifice

Question 52

action potentials

Answer 52

the electric change occurring across the membrane of a nerve or muscle cell during transmission of a nerve impulse