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Anatomy > Muscle Tissue (2) > Flashcards

Muscle Tissue (2) Flashcards

1
Q

Types of muscle tissue

A

Cardiac, smooth, and skeletal

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2
Q

Where is smooth muscle located

A

Walls of GI tract, blood vessels, etc

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3
Q

In smooth muscle, what are the shape of the cells

A

Short and spindle shaped

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4
Q

Nucleus placement in smooth muscle

A

Centrally placed

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5
Q

Do smooth muscle cells have striations

A

No

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6
Q

Smooth muscle activity is regulated by…

A

Autonomic nervous system

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7
Q

Is smooth muscle branched

A

No, unbranched

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8
Q

Function of smooth muscle

A

Propels substances or objects

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9
Q

Forms the myocardium of the heart

A

Cardiac muscle

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10
Q

Tissue is similar to skeletal muscle under microscope

A

Cardiac muscle

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11
Q

Striations in Cardiac muscle are formed by..

A

Actin and myosin filaments within microfibrils

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12
Q

Shorter than skeletal muscle cells

A

Cardiac muscle

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13
Q

Location of the nucleus and features in cardiac muscle

A

Branched, striated, centrally located nucleus

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14
Q

Unique feature or cardiac muscle

A

Intercalated discs

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15
Q

Intercalated discs are found where…

A

Cardiac muscle cells join one other

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16
Q

Promote rapid transmission of impulses through many cardiac muscle cells at once.

A

Intercalated discs

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17
Q

Cardiac muscle cells are voluntary or involuntary

A

Involuntary, regulated by ANS

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18
Q

Function of cardiac muscle

A

Propels blood into circulation

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19
Q

Skeletal muscle is mostly

A

Voluntary

20
Q

Shape of cells and nucleus in skeletal muscle

A

Cylindrical cells, often as long as the muscle itself.

Multinucleate

21
Q

Why is skeletal muscle striated

A

Due to overlapping patterns of protein filaments

22
Q

Cell membrane in skeletal muscle

A

Sarcolemma

23
Q

Skeletal muscle cells are full of…

A

Myofibrils, packed with thin and thick filaments

24
Q

Actin

A

Thin filament

25
Q

Myosin

A

Thick filament

26
Q

Composed of repeating segments called sacromeres

A

Myofibrils

27
Q

Ends of sacromere

A

Z disc or Z line

28
Q

Between two discs, actin and myosin filaments are arranged….

A

Such that myosin filaments have their heads oriented outwards towards the actin filaments

29
Q

During contraction in skeletal muscle,

A

Myosin heads contact actin filaments and draw them towards the center of sacromere to shorten it

30
Q

Muscle contraction is the result of…

A

Contraction of many sacromeres in series.

31
Q

Three types of skeletal muscle connective tissue

A

Endomysium, perimysium, and epimysium

32
Q

Connective tissue surrounding a single muscle fiber

A

Endomysium

33
Q

Connective tissue surrounding a musicale fasicle

A

Perimysium

34
Q

Bundle of skeletal muscle fibers

A

Fascicles

35
Q

Connective tissue surrounding an entire muscle

A

Epimysium

36
Q

During contraction do the length of thick and thin filaments change

A

No

37
Q

Types of muscle contractions

A

Isometric, eccentric, and concentric

38
Q

Contraction of a muscle without the muscle changing in length

A

Isometric

39
Q

Holding weight in hand, not moving

A

Isometric

40
Q

Contraction of muscle while shortening

A

Concentric

41
Q

Contraction of muscle while it’s lengthening

A

Eccentric

42
Q

Flexing bicep, lowering weight, squatting

A

Eccentric

43
Q

Single motor neuron and the muscle fibers it innerverates

A

Motor unit

44
Q

Large motor unit

A

Motor neuron and the many muscle fibers it innervates, strong course movement

45
Q

Small motor unit

A

Motor neuron and the few muscle fibers it innervates (very fine, precise movements)

Anatomy (25 decks)

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