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Anatomy > Chapter 10 Part 1 > Flashcards

Chapter 10 Part 1 Flashcards

1
Q

Branched striated fibers joined by intercalated discs and involuntarily controlled

A

Cardiac muscle tissue

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2
Q

Spindle shaped non straited fibers located in hollow organs and involuntary control

A

Smooth muscle tissue

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3
Q

Produces movements- stabilize body positions -move substances within body -generates heat; shivering the

A

Muscle tissue functions

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4
Q

Electrical excitability, contractobilty extensibility elasticity

A

Muscle tissue properties

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5
Q

Ability to respond to stimuli I

A

Electrical excitibilty

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6
Q

Ability to contract (shorten)

A

Contractobilty

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7
Q

Ability to stretch

A

Extensibility

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8
Q

Ability to return to original shape

A

Elasticity

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9
Q

A connective tissue that surrounds muscles and consists of 3 layers

A

Fascia

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10
Q

Outer layer surrounds entire muscle

A

Epinysuim (fascia layer)

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11
Q

Middle layer; surrounds fascicles (bundles) of muscle fibers

A

Perimysium (fascia layer)

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12
Q

Inner layer; surrounds individual muscle fibers

A

Endomysisum (fascia layer)

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13
Q

Attach muscles to bones

A

Tendons

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14
Q

Flat sheet like tendon

A

Appneurosis

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15
Q

A muscle fiber consists of smaller muscle fibers known as myofibrlis

A

Myofiber

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16
Q

Consists of the smallest muscle fibers known as thick and thin myofilaments

A

Myofibrlis

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17
Q

Plasma membrane and cytoplasm of muscle cell

A

Sarcolemma and sarcoplasma

18
Q

Functional units of straited muscle separated by 2 discs

A

Sarcomeres

19
Q

The darker middle sarea that contains an overlap of both thick and thin filaments

A

A band

20
Q

The area of each A band containing only thick filaments

A

H zone

21
Q

The lighter area of sarcomere containing only thin filaments

A

I band

22
Q

Pass through center of each I band

A

Z discs

23
Q

Composed of myosin

A

thick myofilaments

24
Q

Composed of actin

A

Thin myofilaments

25
Q

Includes myosin and actin

A

Contractible proteins

26
Q

Include troponin and tropomyosin attached to actin

A

Regulatory proteins

27
Q

Thick filaments pull on thin filaments sliding them over thick filaments -Z discs move closer together shortening entire muscle

A

Sliding filament mechanism

28
Q

An enlargement of existing muscle fibers

A

Hypertrophy

29
Q

A decrease in muscle size may result from disuse or denervation

A

Atrophy

30
Q

Group of inherited muscle destroying diseases most common in males

A

Muscular dystrophy

31
Q

Point of contact between neuron and muscle fiber

A

Neuromuscular junction

32
Q

Gap between cells

A

Synaptic cleft

33
Q

Chemicals that relay messages to effectors

A

Neurotransmitter

34
Q

Store neurotransmitters

A

Synaptic vesicles

35
Q

Region of scarcolemma containing neurotransmitter receptors

A

Motor end plate

36
Q

Acetylcholine (Ach) releved from synoptic vesicles into synoptic cleft- Ach binds to Ach receptors on moror end of plate opening sodium ion channels -muscle with potential (MAP) is produced as Na+ flows into muscle cell making it more positively charged

A

Nerve impulse excite skeletal muscle fibers 3 steps

37
Q

In sarcoplasm starts contraction

A

Increased Ca2+ levels

38
Q

Bonds to troponin, uncovering actin binding sites for myosin

A

Ca2+

39
Q

Pulls on actin causing contraction cycle (shortening)

A

Myosin

40
Q

ATP breakdown energizes myosin head

A

Contraction cycle step 1

41
Q

Long striated fibers attached to bones and volantary control

A

Skeletal Muscle tissue

Anatomy (32 decks)

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