organization of skeletal muscle and muscle metabolism Flashcards
factors that are believed to contribute to skeletal muscle fatigue
high intensity –> potassium accumulation in T tubules and ADP +phosphate accumulation
low intensity –> fuel depletion, electrolyte loss, central fatigue
metabolic characteristics of slow oxidative muscle fibers
also known as red (capillaries)
endurance driven
aerobic respiration (oxygen
–> posture, support
anatomical characteristics of slow oxidative muscle fibers
red due to capillaries and myoglobin
presence of mitochondria
–> thinner
anatomical characteristics of fast oxidative muscle fibers
white due to minimal myoglobin
low mitochondria
–> thicker
metabolic characteristics of fast glycolytic muscle fibers
also known as white
intensity driven
anaerobic glycolysis
–> explosive and powerful movements
similar actions of arm/forearm muscles in a particular compartment
anterior = flexion
posterior = extension
similar actions of thigh muscles in a particular compartment
anterior = extension
posterior = flexion
medial = adduction
similar actions of below knee muscles muscles in a particular compartment
anterior = dorsal flexion
lateral = eversion
posterior = plantar flexion
similar actions of abdominal muscles in a particular region
trunk flexion
similar actions of back muscles in a particular region
trunk extension
prime mover (agonist)
primary muscle producing an action
ex. biceps brachii
antagonist
opposes prime mover for control and deceleration
ex. triceps
synergist
assists action
ex. brachioradialis
fixator
prevents bone from moving by stabilizing origin
ex. scalpula
fusiform muscle
spindle shaped
ex. biceps brachaii
