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Human Anatomy 3.4

Muscle Tissue

QuestionAnswer
Isotonic contractions is when the muscle... Has constant tension.
Contractibility is the ability to... Shorten causing tension and contractions.
Cardiac muscle has intercalated discs that contain... Desmosomes and gap junctions.
Isometric contractions is when the muscle... Contracts but does not change.
Concentric contractions is when... Tension overcomes resistance.
During contractions thin filaments... Slide inwards.
During contractions Z discs... Move to each other.
During contractions I band and H zone... Shorten.
During contractions A band and M line... Stay the same.
What do Z discs do? Separate one sarcomere from the next.
Electrical excitability is the ability to... Respond to stimuli by action potentials.
Thick and thin filaments are found in... Myofibrils.
Muscular tissue does what 5 things? Stabilize body position, regulate organ volume, generate heat, propels food and fluids, produces body movements.
Extensibility is the ability to... Stretch without damage.
What is the inner layer that surrounds muscle fibers? Endomysium.
What muscle fibers are striated? Skeletal and cardiac.
What is the junction between motoneuron and skeletal muscle? Neuromuscular junctions.
What is found in H zone? Thick filament.
What is found in I band? Thin filament.
What do A bands do? Overlap thick and thin filaments.
What is the middle layer that surrounds fascicles? Perimysium.
What is the outer layer that surrounds the entire muscle? Epimysium.
What muscular tissue(s) are involuntary? Cardiac and smooth.
What muscular tissue(s) are voluntary? Skeletal.
Elasticity is the ability to... Return to original shape after extension or contraction.
___ pulls on ___ in the contraction cycle. Myosin, actin.
Eccentric contractions is when... Tension slows.
Created by: LaurenNeer
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