Topik 5 Flashcards
Movement occurs as results of
Unbalance forces
Muscle shape
Fusiform - fibers running parallel to each other and to the central tendon
Pennate- set of fibers attached to central tendon
;unipennate
;Bipennate
;Multipennate
Muscle fiber
Structural unit of muscle
Combination collagen+elastin provides strength, structural support, elasticity
Epimysium
Perymisium
Endomysium
Parallel elastic component
connective tissue that surround parallel to contract protein(actin/myosin)
Series elastic component
Refers to connective tissue within tendon
The stretch of parallel and series elastic component generate
Passive length-tension curve
Passive tension stabilize skeletal structures against gravity/other imposed loads
Active force
Muscle fiber is designed to generate force actively in response to stimulus
Sliding filaments
Sliding filaments When sarcomere shorten, thick and thin filaments slide past one another, its called sliding filaments theory
Muscle activate when stimulated by nervous system
Type of muscle activation
-Isometric
-isotonic= concentric/eccentric
Isometric
Muscle produces force without significant change in length
During isometric - the internal torque produced is equal to external torque
Concentric (isotonic)
Muscle produce force at is shortens (contract)
During concentric the internal torque exceeds external torque
Eccentric (isotonic)
Muscle produces an active force while elongated
During eccentric, the external torque exceeds internal torque
Agonist
Muscle that initiate/perform the movement
Antagonis
Muscle that produce the opposite movement
Synergist
Muscle which contract/cooperate additional movement
