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Anatomy > Chapter 6 > Flashcards

Chapter 6 Flashcards

1
Q

Voluntary muscle(s)

A

Skeletal

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2
Q

Involuntary muscle(s)

A

Smooth

Cardiac

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3
Q

Functions of muscular system

A

Locomotion (internal+external)
Maintains posture
Produces heat
Facial expression

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4
Q

Sarcomere and location

A

Contracting unit of myofibril

Found between z-lines

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5
Q

Motor unit

A

One neuron and all the skeletal muscle cells it stimulates

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6
Q

Calcium in contractions

A

Binds on actin
Myosin heads bind to actin + pull
Calcium releases + myosin heads release

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7
Q

Acetycholine

A

A neurotransmitter

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8
Q

Twitch vs tectonic contraction

A

Singly brief jerky

Continuous contraction no relaxation

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9
Q

Which muscles compress the abdomen

A

Rectus abdominis

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10
Q

Abduction

A

Lifted away from body

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11
Q

Adduction

A

Lowered towards body

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12
Q

Circumduction

A

Shoulder circle

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13
Q

Eversion

A

Pinky toe tilted out

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14
Q

Inversion

A

Big toe tilted in (sickle)

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15
Q

Dorsiflexion

A

Toes up (flex)

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16
Q

Plantar flexion

A

Toes down (point)

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17
Q

Flexion

A

Away from body (knee back arm up at shoulder)

18
Q

Extension

A

Brought back towards body

19
Q

Rotation

A

Head side to side (lateral leg out medial leg in)

20
Q

Supination

A

Thumb up

Radius and ulna parallel

21
Q

Probation

A

Thumb down

Radius over ulna

22
Q

Opposition

A

Fingers come together

23
Q

Naming of muscles (7)

A 
Direction
Size
Location
Number of origins
Location or origin and insertion
Shape 
Action
24
Q

biceps brachii

A

prime mover of flexion of forearm, supinates forearm

25
Q

bicep femoris

A

leg

26
Q

deltoid

A

prime mover of arm abduction, injection site

27
Q

frontalis

A

raise eyebrows, wrinkles forehead

28
Q

gastrocnemius

A

prime mover of plantar flexion

29
Q

iliopsoas

A

two muscles prime mover of hip flexion

30
Q

orbicular oculi

A

squint, blink, wink

31
Q

orbicular oris

A

pucker lips

32
Q

pectoralis major

A

adducts, flexes arm

33
Q

rectus femoris

A

injection site quadriceps

34
Q

sartorius

A

‘tailors muscle’ synergist for leg crossing

35
Q

tibialis anterior

A

dorsiflexes and inverts the foot

36
Q

triceps brachii

A

prime mover of elbow extension antagonist of biceps brachii

37
Q

buccinator

A

whistling muscle

38
Q

trapezius

A

extends head, elevate, depress adduct, and stabilize scapula

39
Q

drug that blocks ach receptor sites

A

no contraction. will stop because actin cant bind and there is no signal

40
Q

drug that blocks calcuim from being released

A

myosin cant bind bc heads will not open

41
Q

drug that promotes calcium release

A

enduce contractions petosin

42
Q

drug that paralyzes the nerve to a muscle

A

no signal no contraction blocked stop pain but not the contraction

Anatomy (15 decks)

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