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30 Cards in this Set

  • Front
  • Back
The ability to respond to certain stimuli by producing electrical signals called action potentials?
electrical excitability
-ALL THREE-
The ability of muscular tissue to contract forcefully when stimulated by an action potential?
contractility
-ALL THREE-
The ability of muscular tissue to stretch w/ out being damaged?
extensibility
-SMOOTH & CARDIAC-
The ability of muscular tissue to return to its original length and shape after contraction or extension?
elasticity
-SMOOTH & CARDIAC-
Each skeletal muscle is composed hundreds to thousands of cells, called what?
muscle fibers
Muscle fiber is AKA?
muscle cell
A sheet or broad band of fibrous connective tissue that supports & surrounds muscles & other organs of the body?
fascia
Separates muscle from skin and is composed of areolar connective tissue?
superficial fascia (subcutaneous layer or hypodermis)
Which IS CORRECT baout superficial fascia?
A.provides pathway for nerves, blood &lymph to enter & exit muscle
B.adipose tissue of superficial fascia stores triglycerides
C. serves as an insulating layer that reduces heat loss
D.protects from trauma
E. All the above
E. All the above
Dense irregular connective tissue that lines the body wall and limbs, and holds muscles w/ similiar functions together?
Deep fascia
Which IS NOT a property of Deep fascia?
A.allows free movement of muscles
B.carries nerves, blood, and lymph
C.fills spaces b/t muscles
D.helps w/ stability
D. helps w/ stability
Outermost layer, encircles the entire muscle?
epimysium
surrounds groups of 10-100 or more muscle fibers?
perimysium
Perimysium seperates muscles into what?
fasicles
Separates individual muscle fibers from one another?
ENDOMYSIUM
A cord of dense regular connective tissue composed of parallel bundles of collagen fibers that attach a muscle to bone?
tendon
When the conn. tissue elements extend as a broad layer, the tendon is called what?
aponeurosis
The plasma membrane of a cell?
sarcolemma
Invaginations of the sarcolemma from the surface toward teh center of the muscle fiber?
transverse(T) tubules
Cytoplasm of a muscle fiber?
sarcoplasm
Oxygen-binding protein found only in muscle fibers?
myoglobin
Small structures stuffed inside the sarcoplasm;the contractile organelles of skeletal muscle?
myofibrils
A fluid-filled system of membranous sacs called______ encircle each myofibril?
sarcoplasmic reticulum
AKA: SR
In a relaxed muscle fiber, the SR stores calcium ions? T/F
TRUE
A wasting away of muscle muscles; individual muscle fibers decrease in size b/c of progressive loss of myofibrils?
musclular atrophy
An increase in the diameter of muscle fibers due to increased production of myofibrils, mitochondria, SR, etc?
muscular hypertrophy
Within myofibrils are smaller structures called?
filaments
Filaments are arranged in compartments w/in myofibril called?
sarcomeres
A protein in muscle that functions as a motor protein in ALL THREE TYPES OF MUSCLE TISSUE?
myosin
-composes thick filaments-
Individual actin molecules join to form an actin filament that is twisted in a helix? T/F
TRUE