Muscle Tissues Flashcards
Skeletal Muscle Tissue (Voluntary and Striated)
Attached to bones, and skin of face
Cardiac Muscle Tissue (Involuntary and Striated/Branching)
Located only in the heart wall
Smooth Muscle Tissue (Involuntary and Non-Striated/Spindle-Shaped)
Located in walls of hollow organs
Muscle Tissue
Generate force and movement through contractions
Fascia
Thin connective tissue that surrounds and supports body structures
Tendons
Cord-like insertion of muscle to bone
Aponeuroses
Flat insertion of muscle to bone
Epimysium
Surrounds the whole muscle
Perimysium
Surrounds fascicles (bundles of skeletal muscle fibers) within a muscle
Endomysium
Surrounds muscle fibers (cells) within a fascicle
Excitation-Contraction Coupling
Connection between muscle fiber stimulation and muscle contraction
Hypertrophy
Growth of an organ or tissue
Atrophy
Shrinking of an organ or tissue
Isotonic Contraction
Muscle contracts and changes length
Isometric Contraction
Muscle contracts but does not change length
Concentric
Muscle shortens
Eccentric
Muscle lengthens
Motor Unit
A motor neuron and the muscle fibers it controls
Summation
Building up of muscle tension by rapidly repeated stimuli
Twitch
Single, isolated contraction
What do myoglobins do?
Supply oxygen to myocytes (muscle cells)
Agonist (Prime Mover)
Muscle that initiates an action
Synergist
Muscle that assists agonist
Antagonist
Muscle that works in opposition to the agonist
