Chapter 9-11 Test Flashcards

1
Q

Agonist

A

the main muscle that contracts to perform action, also know as the prime mover

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2
Q

Antagonist

A

the opposing muscle that stretches and yields to the actions of the agonist

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3
Q

Origin of Brachialis

A

lower half of anterior shaft of humerus

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4
Q

Insertion of Brachialis

A

Tuberosity of ulna

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5
Q

Action of Brachialis

A

Flex elbow

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6
Q

Origin of Extensor digitorum longus

A

Lateral epicondyle of tibia, proximal two-thirds of anterior shaft of fibula

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7
Q

Insertion of Extensor digitorum longus

A

Middle and distal phalanges of four lateral toes

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8
Q

Action of Extensor digitorum longus

A

Extends four lateral toes; dorsiflexion of ankle

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9
Q

Origin of levator scapula

A

C1-C4 transverse processes

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10
Q

Insertion of levator scapula

A

Vertebral border of scapula from superior angle to root of spine of scapula

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11
Q

Action of levator scapula

A

Elevation and downward rotation of scapula

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12
Q

Origin of masseter

A

Zygomatic arch

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13
Q

Insertion of masseter

A

mandible

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14
Q

Action of masseter

A

Close jaw

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15
Q

Origin of rectus abdominis

A

Costal cartilages 5, 6, and 7

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16
Q

Insertion of rectus abdominis

A

Pubis

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17
Q

Action of rectus abdominis

A

flex trunk; compress abdominal contents; stabilize trunk

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18
Q

two primary types of muscle fibers

A

slow-twitch fibers
and
fast-twitch fibers

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19
Q

slow-twitch fibers

A

tiny fibers that contract slowly and are capable of prolonged contraction (standing for hours)

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20
Q

fast-twitch fibers

A

are larger in diameter than slow-twitch and produce the most powerful muscle contractions, but fatigue quickly

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21
Q

phantom pain

A

pain in a limb that has been removed

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22
Q

synovial membrane

A

fluid membrane that surrounds a joint

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23
Q

Origin of Trapezius

A

Occiput, ligamentum nuchae, C1-T12

24
Q

Insertion of trapezius

A

Upper: Lateral clavicle, acromion process
Middle: Spine of scapula
Lower: Root of spine of scapula

25
Q

all-or-none response

A

a stimulus must be strong enough to excite the entire fiber orr non of the muscle fiber will react

26
Q

Oxygen debt

A

Extra oxygen is needed to pay off what is used while performing strenuous activity

27
Q

abduction

A

makes the bone absent or away from the midline

28
Q

tensor

A

a muscle that holds a body part rigid

29
Q

parts of the CNS

A

brain and the spinal cord

30
Q

sympathetic nervous system

A

prepares the body for stress (fight or flight)

31
Q

parasympathetic nervous system

A

prepares the body for rest (rest and digest)

32
Q

Autonomic nervous system

A

regulates smooth muscles, cardiac muscle, internal organs, and glands

33
Q

motor neurons

A

also called efferent neurons, have short dendrites and long axons and carry messages from the CNS to the muscles or glands

34
Q

Nociceptors

A

free nerve endings that respond to pain

35
Q

Acetylcholine

A

chemical that carries messages across synaptic cleft at the synapse, the space between two neurons

36
Q

Axon

A

the part of a neuron that carries messages away from the cell body toward target cells

37
Q

Dendrite

A

the receptive surface of a neuron; a thread-like projection like the branch of a tree

38
Q

Endorphin

A

a natural opiate produced by the brain to diminish pain

39
Q

Myelin sheath

A

a layer of insulation that surrounds nerve fibers and speeds up the conduction of electrical impulses

40
Q

Threshold

A

the point at which a stimulus first produces a response

41
Q

Carpal tunnel syndrome

A

a compression of the median nerve in the wrist

42
Q

Thoracic outlet syndrome

A

a compression of the brachial plexus or subclavian artery

43
Q

Broca speech area

A

controls the production of speech with the assistance of several sensory, motor, and association areas of the cerebral cortex

44
Q

Cerebral cortex

A

outer portion of the brain where thought processes take place

45
Q

How many nerves arise from the spinal cord

A

31 pairs extending from the medulla oblongata to the second lumbar vertebra

46
Q

dura mater

A

tough mother - outermost layer of the meninges

47
Q

arachnoid

A

middle layer of the meninges composed of a delicate arrangement of collagen and elastic fibers resembling a spider’s web

48
Q

pia mater

A

delicate mother - third layer of meninges and thickens into triangular processes called denticulate ligaments

49
Q

epidural space

A

a fatty cushioned area between the dura mater and the vertebrae

50
Q

subdural space

A

space between the dura and arachnoid

51
Q

subarachnoid space

A

area between the arachnoid and pia mater

52
Q

Cerebrum

A

largest and most forward (anterior) portion of the brain; functions include higher cognitive functions

53
Q

SITS

A

rotator cuff muscles - Subscapularis, Infraspinatus, Teres minor, Supraspinatus

54
Q

Epicondylitis

A

tennis elbow - irritation of the tissue connecting the forearm muscle to the elbow

55
Q

isometric contraction

A

muscle shortens against resistance with no movement to the joint

56
Q

Origin

A

The point where the muscle attaches to the stationary bone