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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
What are the 3 types of muscle tissue?

Hint: SSC
skeletal, smooth, and cardiac
1. Main tissue of the SKELETAL MUSCLE.
2. CYLINDER shape cell, MULTINUCLEATED & STRIATED
3. VOLUNTARY muscle
Skeletal Muscle Tisue
1. Muscle tissue of most INTERNAL ORGANS.
2. LONG taper cells, spindle shaped, CENTRALLY LOCATED NUCLEUS, NON-SRIATED
3. INVOLUNTARY muscle
Smooth Muscle Tissue
1. Muscle tissue of the HEART
2. INTERCLATED discs, BRANCHING FIBERS, multicellular, STRIATED
3. INVOLUNTARY
Cardiac Muscle Tissue
Dense irregular connective tissue surrounding ENTIRE MUSCLE
Epimysium
Dense irregular connective tissue surrounding a BUNDLE of muscle fibers
Perimysium
Connective tissue covering the INDIVIDUAlL muscle fiber - usually RETICULAR tissue
Endomysium
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
Distinguishing features of skeletal, smooth and cardiac muscle tissue.
Skeletal - Looks like snake skin

Smooth - has smooth lines running across

Cardiac - looks like smeared blood
What is meant by the action of a muscle?
When it contracts...how does it move bones?

"Always exerted as a PULL."
Muscle that DECREASES the angle at a joint or bend bones on one another.

Ex: Biceps Brachii
Flexor
Muscle that INCREASES the angle or a joint or straightens bones out at the joint.

Ex: Triceps brachii
Extensor
Muscles that move bones AWAY from the midline of the body.

Ex: Deltoid muscle
Abductor
Muscles that move bones TOWARDS the midline of the body.

Ex: Pectoralis muscle
Adductors
Describe muscle antagonism.
Throughout the body musclature there are muscles whose actions oppose one another.
thin filaments

made up primarily of proteins molecules called ACTIN

ANCHORED to Z-lines
Actin filaments
What is known as the CONTRACTILE UNIT?
Myofibril
thick filaments

made up primarily of protein molecules called MYOSIN

INTERSPACED between the acin filaments
Myosin filaments
structures to WHICH the ACTIN filaments are ANCHORED
Z-lines
part of the myofibril BETWEEN TWO (2) Z-lines
Sarcomere
part of the myofibril made up ONLY of segments of ACTIN filaments

represent the LIGHT striations
I-band
part of the myofibril made up of MYOSIN filaments AND segments of ACTIN filaments
represent the DARK striations
A-band