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HISTO LAB > EXERCISE 6: MUSCULAR TISSUE > Flashcards

EXERCISE 6: MUSCULAR TISSUE Flashcards

1
Q

Narrow and separate one sarcomere from the next

A

Z DISC

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2
Q

Dark and middle part of sarcomere

A

A BAND

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3
Q

it is lighter and less dense of sarcomere

A

I BAND

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4
Q

Narrow and it is thick filaments but no thin filaments

A

H ZONE

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5
Q

It is the center of H zone and sarcomere

A

M LINE

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6
Q

It is the structural proteins that connects Z disc to M line of sarcomere, thereby helping to stabilize thick filaments position; can stretch and then spring back unharmed, and thus accounts for much of the elasticity and extensibility of myofibrils.

A

TITIN

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7
Q

It is the structural protein of Z discs that attach to actin molecules of thin filaments and titin molecules.

A

a - ACTIN

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8
Q

It forms M line of sarcomere; binds to titin molecules and connects adjacent thick filaments to one another.

A

MYOMESIN

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9
Q

Wraps around entire length of each thin filaments; helps anchor thin filaments to Z discs and regulates length of thin filaments during development

A

NEBULIN

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10
Q

Links thin filaments of sarcomere to integral membrane proteins in sarcolemma, which are attached in turn to proteins in connective tissue matrix that surrounds muscle fibers; thought to help reinforce sarcolemma and help transmit tension generated by sarcomeres to tendons.

A

DYSTROPHIN

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11
Q

What type of muscle Intercalated discs are found in gap junctions?

A

Cardiac muscle

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12
Q

It is found in hollow organs and blood vessels.

A

Smooth muscle

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13
Q

Attached to bones and tendons

A

Skeletal muscle

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14
Q

Mitochondria are larger and more abundant in this type

A

Skeletal muscle

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15
Q

Contracts only when stimulated

A
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16
Q

TRUE OR FALSE. Muscle cells are mesenchymal in origin

A

TRUE

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17
Q

TRUE or FALSE. Myomesin binds to titin molecules and connects adjacent thick filaments to one another.

A

TRUE

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18
Q

TRUE or FALSE. FOG (Fast Oxidative-Glycolytic) fibers are adopted for maintaining posture and for aerobic, endurance-type activities.

A

FALSE

SO (Slow Oxidative) fibers

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19
Q

TRUE or FALSE. Hemoglobin is the red-colored protein found in muscles.

A

FALSE

Myoglobin

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20
Q

TRUE or FALSE. The narrow region in the center of each A band that contains thick filaments is the H zone.

A

TRUE

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21
Q

It is striated and involuntary control

A

CARDIAC MUSCLE

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22
Q

It is a non-striated and involuntary control

A

SMOOTH MUSCLE

23
Q

It is striated and voluntary control

A

SKELETAL MUSCLE

24
Q

It is a special characteristic of Cardiac Muscle Fiber that contains gap junctions.

A

INTERCALATED DISCS

25
Q

Type of Skeletal Muscle Fibers that contains many large mitochondria and appear dark red because they contain large amounts of myoglobin

A

Slow Oxidative (SO) Fibers

26
Q

The type of skeletal muscle fibers that is the largest and contains large amounts of myoglobin and many blood capillaries; appears dark red. It contributes to activities like walking and sprinting

A

Fast Oxidative - Glycolytic (FOG) Fibers

27
Q

Type of skeletal muscle fiber that has low myoglobin content, few blood capillaries, few mitochondria, and appears white in color

A

Fast Glycolytic (FG) Fibers

28
Q

It is the outer layer, encircling the entire muscle, and consists of dense irregular connective tissue

A

Epimysium

29
Q

It surrounds groups of 10 to 100 or more muscle fibers, separating them into bundles called FASCICLES, and it consists of dense irregular collagenous connective tissue

A

Perimysium

30
Q

It surrounds and separates individual muscle fibers from one another, and consists mostly of reticular fibers

A

Endomysium

31
Q

It consists of a long series of sarcomeres separated by Z discs and containing thick and thin filaments that overlap in certain regions

A

Structure of Myofibril

32
Q

The basic functional contractile unit of a myofibril

A

Sarcomere

33
Q

Generate force during contraction

A

Contractile proteins

34
Q

It helps switch the contraction process on and off

A

Regulatory proteins

35
Q

It keeps thick and thin filaments of myofibrils in proper alignment, gives myofibrils elasticity and extensibility, and links myofibrils to the sarcolemma and extracellular matrix

A

Structural proteins

36
Q

Long, finger-like invaginations of the sarcolemma that penetrate into the sarcoplasm

A

Transverse (T) Tubules

37
Q

It is found just beneath the sarcolemma

A

Nuclei

38
Q

A large molecule composed of many glucose molecules and can be used for ATP synthesis

A

Glycogen

39
Q

A red-colored protein, found only in muscle, binds oxygen molecules that diffuse into muscle fibers from interstitial fluid and releases oxygen when it is needed by the mitochondria for ATP production

A

Myoglobin

40
Q

Lie in rows throughout the muscle fiber, strategically close to the contractile muscle proteins that use ATP during a contraction so that ATP can be produced

A

Mitochondria

41
Q

A fluid-filled system of membranous sacs encircles each myofibril, and in a relaxed muscle fiber, the sarcoplasmic reticulum stores calcium ions (Ca). Release of Ca from the terminal cisterns of the SR triggers muscle contraction

A

Sarcoplasmic reticulum

42
Q

It is dilated end sacs of the Sarcoplasmic reticulum

A

Terminal cisterns

43
Q

The contractile organelles of skeletal muscle and containing thin and thick filaments (myofilaments) whose overlapping organization produces staining differences that cause striations

A

Myofibrils

44
Q

It consists of elongated muscle cells

A

Muscle fibers or Myocytes

45
Q

Walking and running, localized movements like holding a pencil,
writing, or nodding the head due to muscular contractions rely on the integrated functions of skeletal muscles, bones, and joints.

A

Producing body movements

46
Q

Skeletal muscle contractions stabilize joints and help maintain body positions like standing or sitting. Postural muscles contract continuously when you are awake;
for example, sustained contractions of your neck muscles hold your head upright when you are listening intently to your teacher talk about the muscular tissue.

A

Stabilizing body position

47
Q

The heart pump blood through the blood vessels by the contractions of
the cardiac muscle. Skeletal muscle contractions promote the flow of lymph and aid the return of blood in veins to the heart.

A

Storing and moving substances within the body

48
Q

Storage is done by sustained contractions of ring like bands of smooth muscle

A

Sphincters

49
Q

Thermogenesis is the process of producing heat. Muscular tissues produce heat during contraction. Most of the heat generated by the muscle is used to maintain normal
body temperature.

A

Generating heat

50
Q

It is the involuntary contractions of skeletal muscle which can increase the rate of heat production.

A

Shivering

51
Q

It is an important component of certain secretory glands, where they function to expel secretions from glandular acini

A

Myoepithelial cells

52
Q

Smooth muscle-like cells that surround blood vessels

A

Pericytes

53
Q

It is a cell that has a contractile role in addition to being able to secrete
collagen. This type of cell is not readily seen in normal tissues but becomes essential following tissue damage during the healing and repair process, forming a
scar.

A

Myofibroblasts

54
Q

Movement is generated by the interaction of the proteins actin and myosin

A

Contractile proteins

HISTO LAB (1 decks)

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