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30 Cards in this Set

  • Front
  • Back

Basic tissue is responsible for locomotion of the individual, movement of various parts of t the body

Muscle tissue

Are often referred as muscle fibers; individually enveloped by basal lamina

Muscle cells

Cell membrane (in muscle cells)

Sarcolema

Cytoplasm (in muscle cells)

Sarcoplasm

Endoplasmic reticulum (in muscle cells)

Sarcoplasmic reticulum

Mitochondria (in muscle cells)

Sarcosomes

3 types of muscle cells (fibers)

1. Skeletal


2. Smooth


3. Cardiac

Contains bundles of very long, multinucleated cells with cross-striations

Skeletal muscle

Name 2 muscle that are voluntary

1. Skeletal


2. Smooth

Collection of numerous muscle fibers that are arranged in groups

Bundles of fascicle

Bundles of fascicle is enveloped by a tough dense irregular connective tissue called...

Epimysium

Each of the fasicles that compromise a muscle is, in turn encased by connective tissue called... ; Where nerve fibers and blood vessel occurs

Perimysium

The numerous muscle fibers that comprise a muscle fassicle are also individually wrapped and supported, external to their basal lamina, a delicate connective tissue called... Where the extracellular fibers are mainly reticular fibers

Endomysium

Myofibril is actually made up of small contractile units called

Sarcomeres

Refers to the regions that spans two z-lines and is about 1.5 to 2 um long in a resting muscle

Sarcomere

Occupy the middle zone of sacromere

Thick filaments

Occupy the peripheral zones of sacromere

Thin filaments

Proteins in muscle filaments

1. Actin


2. Tropomyosin


3. Troponin


4. Myosin

Types of skeletal muscle fibers

1. Red muscle fibers


2. White muscle fibers


3. Intermediate muscle fibers

Smaller and have richer blood supply; has more mitochondria, glycogen granules and myoglobin

Red muscle fibers

A.k.a "fast twitch muscle fibers". They contract faster and more forceful but they fatigue faster

White muscle fibers

Have morphological and physiological characteristics that are in between red and white muscle fibers

Intermediate muscle fibers

Occurs only in the heart.

Cardiac muscle

Cross-striations and is composed of elongated, often branched cells bound to one another at structures called...

Intercalated discs

Serves as anchoring sites for actin filaments

Fasciae adherentes

Bind the cardiac cells together

Maculae adherens

Provide ionic continuity between adjacent cells

Gap junctions

Specialized to initiate and conduct the electrical impulse that controls cardiac contractions

Purkinje fibers

Muscle that compromises the muscular component of the wall and parenchyma of most visceral organs

Smooth muscle

Otherwise known as visceral muscle

Smooth muscle