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Anatomy 1 Final > Histo- Muscle Tissue > Flashcards

Histo- Muscle Tissue Flashcards

1
Q

Three types of muscle tissue

A

Skeletal, Cardiac and Smooth

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2
Q

The ability of muscle tissue to respond to stimuli and produce electrical events is this characteristic

A

Excitability

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3
Q

The ability of muscle tissues to generate force or tension is this characteristic

A

Contractability

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4
Q

The ability of muscle tissue to be stretched is this characteristic

A

Extensibility

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5
Q

Is extensibility passive or non passive?

A

Passive

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6
Q

The ability of muscle tissue to return to its original length after being shortened or lengthened is this characteristic

A

Elasticity

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7
Q

Functions of muscle tissue

A

Produce movement
Maintain posture
Stabilize joints
Generate heat

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8
Q

Type of muscle tissue that is under voluntary control

A

Skeletal

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9
Q

What is the arrangement of skeletal muscle?

A

Striated

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10
Q

What is the appearance of skeletal muscle nuclei?

A

Peripheral and oval shaped, multi nucleated

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11
Q

Involuntary muscle that acts upon the heart

A

Cardiac

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12
Q

What is the appearance of cardiac muscle?

A

Elongated and branched cells joined by intercalated discs

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13
Q

What join cardiac muscles to one another?

A

Intercalated discs

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14
Q

What is the appearance of cardiac muscle nuclei?

A

Uni-nucleated cells with a centrally located nucleus

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15
Q

Type of muscle tissue involved with involuntary control not in the heart

A

Smooth

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16
Q

What is the arrangement of smooth muscle?

A

Nonstriated

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17
Q

What type of cells does smooth muscle have?

A

Fusiform

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18
Q

What is the orientation of the nucleus in smooth muscle?

A

Uninucleated, centrally located

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19
Q

Type of muscle fiber that derives energy primarily from aerobic oxidative phosphorylation of fatty acids

A

Type I–Slow, Red Oxidative Fibers

20
Q

What is Type I-Slow, red oxidative fibers adapted for

A

Slow, continuous contractions over a long period of time, i.e. posture muscles

21
Q

What gives muscle fibers dark red color?

A

Myoglobin

22
Q

Type of muscle fiber that utilizes both oxadative metabolism and anaerobic glycolosis to produce energy?

A

Type IIa-Fast, Intermediate Oxadative-Glycolytic Fibers

23
Q

What are Type IIa - Fast, Intermediate Oxadative - Glycolytic fibers adapted for?

A

Rapid contractions and short bursts of energy.

24
Q

Type of muscle fiber that derives energy primarily via anaerobic glycolysis

A

Type IIb - Fast, White Glycolytic Fibers

25
Q

What gives muscle fibers a pale color?

A

Glycogen

26
Q

What are Type IIb - Fast, White Glycolytic fibers adapted for?

A

Rapid contraction, but they fatigue quickly

27
Q

Where is the sarcomere located on the myofibril?

A

from z disc to z disc

28
Q

What is the functional unit of a muscle?

A

Sarcomere

29
Q

Where is the A band located?

A

Between the I bands

30
Q

The thick myosin filament is this part of the sarcomere

A

All of the A band

31
Q

Part of the myofibril that is actin only

A

I band

32
Q

Part of the myofibril that is myosin only

A

H band

33
Q

This runs down the center of the H band

A

M line

34
Q

Muscle contraction happens because of this

A

Myosin pulls the Z discs toward the middle

35
Q

When thick and thin filaments start to slide past one another and the I band, H zone are narrower and shorter

A

Partially contracted muscle

36
Q

When the H zone and I band disappear and the sarcomere is at its shortest length

A

Fully contracted muscle

37
Q

Do the lengths of the thick and thin filaments change their length when they contract muscle?

A

No

38
Q

This wraps around the myofilament and blocks the myosin binding sites

A

Tropomysin

39
Q

This polymerizes to create F- Actin, the binding site for myosin

A

G- Actin

40
Q

This is composed of three sub units that are bound to tropomysin

A

Troponin complex

41
Q

One of these is the part of the troponin sub unit that binds to the tryptomysin

A

TnT

42
Q

Two of these is the part of the troponin sub unit that binds calcium that fuels the trigger for contraction

A

TnC

43
Q

What binds to the myosin heads

A

Actin and ATP

44
Q

What makes up the triad that is found around the myofibril?

A

1 T tubule and 2 terminal cisternae

45
Q

Conformational change of the terminal cisterna of the sarcoplasmic reticulum causes the release of this

A

Calcium

46
Q

A chemical synapse between a motor neuron and a skeletal muscle fiber

A

Neuromuscular junction

47
Q

The motor neuron and all the muscle fibers in innervates

A

Motor unit

Anatomy 1 Final (13 decks)

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