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Chapter 10: Muscular Tissue > Terms > Flashcards

Terms Flashcards

1
Q

Move the bones of the skeleton; voluntary; straited

A

Skeletal muscle tissue

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2
Q

Forms most of the heart wall; striated; involuntary

A

Cardiac muscle tissue

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3
Q

Built in rhythm that has a natural pacemaker that initiates each contraction of heart beats

A

Autorythmicity

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4
Q

Located in the walls of hollow internal structures such as blood vessels airways and most organs in the abdominal pelvic cavity

A

Smooth muscle tissue

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5
Q

Produce and body movements stabilizing body positions storing in moving substances within the body generating heat

A

Functions of muscular tissue

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6
Q

Ability to respond to certain stimuli by producing electrical signals

A

Electrical excitability

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7
Q

Referred to as muscle action potential’s in muscles and nerves action potentials in nerves. Electrical signals

A

Action potentials (impulses)

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8
Q

Ability of muscular tissue to contract forcefully when stimulated by an action potential

A

Contractility

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9
Q

The ability of muscular tissue to stretch within limits without being damaged

A

Extensibility

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10
Q

Ability of muscular tissue to return to its original length and shape after contraction or extension

A

Elasticity

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11
Q

Each skeletal muscle has a separate organ composed of hundreds to thousands of cells called

A

Muscle fibers

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12
Q

Separates muscle from skin; composed of areole or connective tissue and adipose tissue; provides a pathway for nerves and blood vessels and lymphatic vessels to enter and exit muscles

A

Subcutaneous layer

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13
Q

Dense shade or broad band of irregular connective tissue that lines the body wall and limbs and supports and surrounds muscles and other organs of the body

A

Fascia

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14
Q

Outer layer circling the entire muscle; consist of density regular connective tissue

A

Epimysium

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15
Q

Layer of dense irregular connective tissue but surrounds groups of 100 or more muscle fibers separating them into bundles called fascicles

A

Perimysium

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16
Q

Little bundles

A

Fascicles

17
Q

Penetrates the interior of each fascicle and separate individual muscle fibers from one another

A

Endomysium

18
Q

Attaches a muscle to the periosteum of a bone

A

Tendon

19
Q

When the connective tissue elements extend as a broad flat sheet, it is called

A

Aponeurosis

20
Q

Plasma membrane of a muscle cell

A

Sarcolemma

21
Q

Tiny invaginations of the sarcolemma that tunnel in from the surface towards the center of each muscle fiber; filled with interstitial fluid

A

T tubule

22
Q

Cytoplasm of a muscle fiber; includes a substantial amount of glycogen which can be used for synthesis of ATP

A

Sarcoplasm

23
Q

Found only in muscle; binds oxygen molecules that diffuse into the muscle fibers for interstitial fluid; releases oxygen when it is needed by the mitochondria for ATP production

A

Myoglobin

24
Q

Fluid filled system of membranous sacs

A

Sarcoplasmic reticulum

25
Q

Dilated end sacs of the sarcoplasmic reticulum butt against the T-tubule from both sides

A

Terminal cisterns

26
Q

Transverse tubule and the two terminal cisterns on either side of it form a

A

Triad

27
Q

Within myofibrils are smaller protein structures called

A

Filaments

28
Q

Composed of Actin

A

Thin filaments

29
Q

Composed of myosin

A

Thick filaments

30
Q

Basic functional units of a myofibril

A

Sarcomere

31
Q

Separate one sarcomere from the next

A

Z disk

32
Q

Darker middle part of the sarcomere which extends the entire length of the thick filaments

A

A band

33
Q

Wine or less dense area that contains the rest of the thin filaments but no thick filaments and a Z disc passes through the center of each

A

I band

34
Q

In the center of each A band contains thick but not thin filaments

A

H zone

35
Q

Middle of the sarcomere

A

M line

36
Q

Main component of thick filaments and functions as a motor protein in all three types of muscle tissue

A

Myosin

37
Q

Main component and thin filaments; individual actin molecules joined to form an actin filament that is twisted into a helix each actin molecule is a myosin binding site where a myosin head can attach

A

Actin

38
Q

Smaller amounts of two regulatory proteins; also part of the thin filament

A

Tropomyosin and troponin

39
Q

Third most plentiful protein in skeletal muscle. Each one connects a Z disc to an M line, helping stabilize the position of the thick filament

A

Titin

Chapter 10: Muscular Tissue (1 decks)

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