Muscular System Flashcards

1
Q

prefixes of the muscular system?

A

Myo, Mys, Sarco

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2
Q

how many muscles are in the human body?

A

600

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3
Q

the 4 functions of the muscular system are?

A

1) to contract to cause movement
2) to stabilize the joints
3) to maintain body posture
4) generate heat vital for normal body temperature

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4
Q

characteristics of skeletal muscle are?

A

1) found attached to bones
2) long cylindrical multinucleate cells
3) very striated
4) voluntary

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5
Q

characteristics of smooth muscle are?

A

1) found lining the internal organs
2) spindle shaped uninucleate cells
3) no striations
4) involuntary

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6
Q

characteristics of cardiac muscles are?

A

1) found in the walls of the heart
2) a branching network on uninucleate cells
3) slightly striated
4) involuntary

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7
Q

muscles contain long ribbon like organelles called?

A

myofibrils

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8
Q

myofibrils contain what?

A

alternating bands of light (I) and dark (A) bands

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9
Q

myofibrils are made up of what?

A

sarcomeres->which are made up of myofilaments-> (thick filaments-myosin-dark(A)) + (thin filaments-Aetin-light(I))

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10
Q

what gives muscle its striated appearance?

A

the arrangement of myofilaments inside the myofibrils

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11
Q

what is muscle tone?

A

A state of partial contraction of skeletal muscles (involuntary)

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12
Q

effects of aerobic exercise?

A

stronger, more flexible muscles with greater resistance to fatigue

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13
Q

effects of resistance or isometric exercise?

A

forcing the muscle to contract with as much force as possible. increases the size and definition of muscle

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14
Q

bringing the distance of two bones closer together (bending)?

A

flexion

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15
Q

Increasing the distance between two bones (straightening)?

A

Extension

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16
Q

the movement of a cone along its longitudinal axis?

A

Rotation

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17
Q

moving a limb AWAY from the midline of the body

A

abduction (abs bend back away from the midline)

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18
Q

moving a limb TWARD the midline

A

adduction (adds to mass at the midline)

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19
Q

moving the superior part of the foot toward the shin

A

Dorsiflexion

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20
Q

depressing the foot (standing on your toes)

A

Plantar flexion

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21
Q

rotation of the forearm laterally so the palms face anteriorly

A

supination

22
Q

rotation of the forearm medially so that the palms face medially

A

pronation

23
Q

antagonist muscles?

A

oppose each other

24
Q

what are muscles that work together called?

A

synergists

25
Q

criteria for naming muscles? (7 of them)

A

1) division of muscle fibers
2) relative size of the muscle
3) location of the muscle
4) number of origins
5) location of the muscle’s origin and insertion
6) shape of the muscle
7) action of the muscle

26
Q

frontalis

A

forehead muscle

27
Q

orbicularis oculi

A

muscle around the eye

28
Q

orbicularis oris

A

muscle around the mouth (kissing muscle)

29
Q

temporalis

A

muscles around the temples

30
Q

zygomaticus

A

run from the jaw to the cheek bones (smiling muscles)

31
Q

sternocleidomastoid

A

two paired muscles running along the neck

32
Q

platysma

A

muscles along the anterolateral neck

33
Q

Pectoralis major

A

large fan shaped muscle covering the upper chest

34
Q

rectus abdominis

A

longitudinal muscles running from the pubis to the rib cage. most superficial.

35
Q

external oblique

A

muscles along the lateral abdominal wall (sides)

36
Q

biceps brachii

A

upper arm muscle around the humorous. flexor

37
Q

deltoid

A

muscle forming the curve of the shoulder

38
Q

Iliopsoas

A

hip flexor

39
Q

adductor muscle

A

muscle making up the medial area of the thigh

40
Q

sartorious

A

thin, strap-like, most superficial thigh muscle

41
Q

Quadriceps group

A

the major anterior thigh muscles.

42
Q

the quadriceps are made up of?

A

rectus femurus, vastus laterails, vastus mediallis

43
Q

tibialis anterior

A

the muscle around the tibia of the lower leg

44
Q

fibularis longus

A

muscle along the lateral lower leg

45
Q

trapezius

A

a kite shaped muscle covering the posterior neck and trunk

46
Q

deltoid

A

curve of the shoulder

47
Q

latissmus dorsi

A

large flat extensive muscle covering the low back

48
Q

triceps brachii

A

posterior upper arm muscle (extensor)

49
Q

gluteus maximus

A

buttocks

50
Q

hamstrings group

A

major posterior thigh muscles

51
Q

the hamstrings consist of?

A

biceps femouris, semimembranosus, semitendinosus

52
Q

gastrocnemius

A

baby cow muscle. inserts into the Achilles tendon and helps to lift the heel. (toe dancers muscle)