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23 Cards in this Set
- Front
- Back
List the 4 physiology characteristics of muscle tissue.
Hint: ECEE |
Exitability
Contractability Elasticity Extensibility |
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What are the 3 types of muscle tissue?
Hint: SSC |
skeletal, smooth, and cardiac
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1. Main tissue of the SKELETAL MUSCLE.
2. CYLINDER shape cell, MULTINUCLEATED & STRIATED 3. VOLUNTARY muscle |
Skeletal Muscle Tisue
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1. Muscle tissue of most INTERNAL ORGANS.
2. LONG taper cells, spindle shaped, CENTRALLY LOCATED NUCLEUS, NON-SRIATED 3. INVOLUNTARY muscle |
Smooth Muscle Tissue
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1. Muscle tissue of the HEART
2. INTERCLATED discs, BRANCHING FIBERS, multicellular, STRIATED 3. INVOLUNTARY |
Cardiac Muscle Tissue
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Dense irregular connective tissue surrounding ENTIRE MUSCLE
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Epimysium
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Dense irregular connective tissue surrounding a BUNDLE of muscle fibers
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Perimysium
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Connective tissue covering the INDIVIDUAlL muscle fiber - usually RETICULAR tissue
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Endomysium
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Name 2 ways cardiac muscle tissue differs from skeletal muscle tissue.
Hint: ID & BF |
1. Cardiac muscle tissue has INTERLACED DISCS.
2. Cradiac muscle fibers have BRANCHING of FIBERS |
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Distinguishing features of skeletal, smooth and cardiac muscle tissue.
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Skeletal - Looks like snake skin
Smooth - has smooth lines running across Cardiac - looks like smeared blood |
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What is meant by the action of a muscle?
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When it contracts...how does it move bones?
"Always exerted as a PULL." |
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Muscle that DECREASES the angle at a joint or bend bones on one another.
Ex: Biceps Brachii |
Flexor
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Muscle that INCREASES the angle or a joint or straightens bones out at the joint.
Ex: Triceps brachii |
Extensor
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Muscles that move bones AWAY from the midline of the body.
Ex: Deltoid muscle |
Abductor
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Muscles that move bones TOWARDS the midline of the body.
Ex: Pectoralis muscle |
Adductors
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Describe muscle antagonism.
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Throughout the body musclature there are muscles whose actions oppose one another.
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thin filaments
made up primarily of proteins molecules called ACTIN ANCHORED to Z-lines |
Actin filaments
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What is known as the CONTRACTILE UNIT?
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Myofibril
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thick filaments
made up primarily of protein molecules called MYOSIN INTERSPACED between the acin filaments |
Myosin filaments
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structures to WHICH the ACTIN filaments are ANCHORED
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Z-lines
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part of the myofibril BETWEEN TWO (2) Z-lines
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Sarcomere
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part of the myofibril made up ONLY of segments of ACTIN filaments
represent the LIGHT striations |
I-band
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part of the myofibril made up of MYOSIN filaments AND segments of ACTIN filaments
represent the DARK striations |
A-band
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