Exercise Physiology Flashcards
what is the basic unit of skeletal muscle?
sarcomere
in generation of energy from the creatine phosphate system, the ATP and creatine phosphate are located in what portion of the sarcomere?
cytoplasm
pyruvate can be utilized to form what other substrate other than ATP?
lactate
what is meant by acute and chronic training load in terms of duration studied?
acute - 7 days
chronic - 28 days
when calcium is released from the sarcoplasmic reticulum, it binds to what structure?
troponin
which structure blocks myosin from binding to actin at rest?
tropomyosin
what reaction is responsible for the myosin head “recocking” after a cross bridge is finished?
partial hydrolysis of a new ATP into ADP and Pi
the action potential travels from the neuromuscular junction to what structure first and then what structure second?
sarcolemma first and then the T-tubules
what does FITT-VP stand for in terms of exercise prescription?
frequency
intensity
time
type
volume
progression
consistent aerobic exercise decreases vagal tone and increases vasodilation partially through lowering what neurotransmitter in the plasma?
norepinephrine
in general when should you consider pre-exercise stress testing?
when you have concern for s/s of CVD
BP should be under what value before starting an exercise program?
< 180/105
which class of anti-HTN medication is the least likely to cause negative effects on exercise tolerance?
ACEi/ARB
t/f exercise causes OA in previously normal joints
false
describe central vs. local adaptations to aerobic training
central - cardiorespiratory fitness
local - muscle metabolic
which equation characterizes the central adaptation components to aerobic training?
CO = HR x SV
when comparing vo2 max and local muscle metabolic changes with exercise, which is more important for improving athletic performance?
muscle local metabolic changes
metabolic syndrome patients have dysfunction of what cellular component?
mitochondria
what is the only mechanism known to stimulate and maintain proper mitochondrial function?
regular exercise
fatty acyl coa is transported across the mitochondrial membrane by what enzyme?
CPT-1
once inside the mitochondrial matrix, fatty acyl coa undergoes what process?
beta oxidation
fat is the preferred fuel up until exercise intensities of what percentage of vo2 max?
55-75%
which amino acid is synethesized in skeletal muscle and sent to the liver to be converted to glucose?
alanine
