Ex Phys Flashcards
(25 cards)
The unit of contraction
Sarcomere
A single nerve and the group of fibers it innervates
Motor unit
Chemical junctions for the transmission of impulses
synapses
Where is 95% of creatine found in the body
in the muscle
Enzyme that transfers the phosphate from CP to ADP to create ATP
Creatine Kinase
Where does ATP utilization during muscle contraction occur
in the cytoplasm
VO2 max norm for sedentary ppl
30-40 ml/kg/min
VO2 maX norm for recreationally active
40-60 ml/kg/min
VO2 Max norm for elite endurance athletes
65-85 ml/kg/min
VO2 Max is influenced by what factors
genetics, age, gender, training status, health status
Slow oxidative muscle fibers
Type 1
Type of muscle fiber that has high density of capillaries, and many mitochondria
Type 1
Endurance athletes have higher than normal amt of what type of muscle fiber
Type 1
Muscle fiber type that has low myoglobin content
Type IIX
Type of muscle fiber than can hydrolyze ATP at a high rate and have a fast peak contraction velocity
Type IIX
Pattern of substrate use is dictated mainly by..
exercise intensity
Represents the highest rate of aerobic energy production that can be acheived
Maximum oxygen uptake, VO2 max
The product of heart rate and stroke volume
Cardiac output
the volume of blood ejected by the left ventricle with each beat
stroke volume
transports oxygen in the blood
hemoglobin
produces large amounts of lactic acid leading to fatigue
anaerobic glycolysis
byproducts of aerobic glycosis
water and CO2
energy pathway used for explosive movements and short sprints
ATP & CP splitting in the muscle
energy pathway used for short sprints
anaerobic glycolysis
