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Anatomy & Physiology > Muscular System > Flashcards

Muscular System Flashcards

1
Q

External Oblique

A

decompresses ribs, flexes spinal column, compresses abdominal cavity

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2
Q

Latissimus Dorsi

A

adducts, medially rotates, and extends the arm

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3
Q

Hamstrings

A

extends hip and flexes knee

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4
Q

Internal Oblique

A

decompresses ribs, flexes spinal column, compresses abdominal cavity

runs opposite to external oblique, and is deeper

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5
Q

Gracilis

A

hip adduction, knee flexion, and knee internal rotation

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6
Q

Soleus

A

extends foot

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7
Q

Brachioradialis

A

flexes forearm at elbow

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8
Q

Biceps Brachii

A

flexes lower arm

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9
Q

triceps brachii

A

extends lower arm

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10
Q

Deltoid

A

abducts the upper arm

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11
Q

Frontalis

A

wrinkles forehead, raises eyebrows

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12
Q

Orbicularis Oculi

A

closes eyelid, tightens skin on forehead

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13
Q

Masseter

A

closes jaw

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14
Q

Zygomaticus

A

raises corners of mouth

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15
Q

Orbicularis Oris

A

compresses and closes lips

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16
Q

Sternocleidomastoid

A

flexes head, rotates head to opposite side

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17
Q

Pectoralis major

A

flexes arms and adducts upper arm

18
Q

Intercostals

A

expand and shrink chest cavity

19
Q

rectus abdominis

A

compresses abdomen

20
Q

sartorius

A

flexes and rotates thigh and leg

21
Q

adductor muscle

A

adducts the legs

22
Q

gastrocnemius

A

points toes, flexes lower leg

23
Q

Iliopsoas

A

flexes and internally rotates thigh at hip joint, flexes trunk

24
Q

Trapezius

A

moves shoulder, extends head

25
Q

Gluteus medius

A

abducts and rotates thigh

26
Q

gluteus maximus

A

extends femur and rotates it outward

27
Q

muscle fiber

A

muscle cell

28
Q

Fascia

A

a sheet made of fibrous connective tissue that covers, supports, and separates muscle

29
Q

sarcomere

A

contractile unit of muscle

30
Q

myofibril

A

tightly packed filament bundles found within skeletal muscle fibers

31
Q

actin

A

thin filament of a muscle fiber

32
Q

myosin

A

thick filament of muscle fiber

33
Q

sarcoplasmic reticulum

A

houses the calcium needed to bind to the troponin

34
Q

tropomyosin

A
35
Q

tendon

A

attaches muscle to bone

36
Q

ligament

A

attaches bone to bone

37
Q

muscle microanatomy flowchart

A

muscle (fascia/epimysium) -> fasicle (perimysium) -> muscle fiber (endomysium) -> myofibril

38
Q

sarcolemma

A

plasma membrane of a muscle fiber

39
Q

transverse tubules (T tubules)

A

assist in muscle contraction; located along the sarcolemma

40
Q

sarcoplasm

A

the cytoplasm of the muscle cell; has lots of mitochondria

Anatomy & Physiology (6 decks)

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