Chapter 6 Flashcards
THe primary function of the cardiovascular system during aerobic exercise is to ?
delever oxygen and nutritents to the muscle
cardiac output
the amount of blood pumped by the heart in leters per minute
cardiac output is determined by?
the quantity of blood ejected with each beat (stroke volume) and the hearts rate of pumping (heart rate)
stroke volume
blood ejected with each beat
Volume=how much
Cardiac output formula
stroke volume x heart rate
Q+SV x xHR
college men maximal stroke volume
100 and 115 ml of blood
what is responsible for the regulation of stroke volume?
end-diastolic volume and the action of catecholamines (epinephrine and norepinephrine
end-diastolic volume
the volume of blood available to be pumped by the left ventricle at the end of the filling phase (diastole
venous return
the amount of blood returning to the hear
frank-starling mechanism
with aerobic exercise more blood returns to the heart diastolic volume is increased, myocardial fibers become more stretched , more forceful contraction of systolic ejection
how to calculate maximal HR
220-age plus or minus 10
how to calculate VO2 max?
cardiac output x arteriovenous oxygen difference
systolic blood pressure
the pressure exerted against the arterial walls as blood is forcefully ejected during ventricular contraction (systole)
diastolic blood pressure
the pressure exerted against the arterial walls when no blood is being forcefully ejected through the vessels
total peripheral resistance
the resistance of the entire systemic circulation
acute aerobic exercies results in an increase of?
cardiac output stroke volume HR oxygen uptake systolic blood pressure blood flow to active muscles
acute aerobic exercise results in a decrease of?
diastolic blood pressure (decrease=diastolic)
minute ventilation
the volume of air breathed per minute (increases with exercise)
tidal volume
the amount of air inhaled and exhaled with each breath
aerobic endurance training adaptations of muscular strength and sprint speed, anaerobic power, and maximal rate of force production
no charge
aerobic endurance training adaptations for muscular endurance and aerobic power
increase
aerobic endurance training adaptations for fiber size, myofibrillar activity, cytoplasmic density and myosin heavy chain protein
no change
aerobic endurance training adaptations for capillary density and mitochondrial density
increases
aerobic endurance training adaptations for creatine phosphokinase, myokinase and sodium potassium atpase
increase
aerobic endurance training adaptation for stored ATP, stored creatine phosphate, stored glycogen, stored triglycerides
increases
aerobic endurance training adaptations for ligament strength and tendon strength
increases
aerobic endurance training adaptations for % body fat
decreases
aerobic endurance training adaptationsfor fat-free mass
no change
biggesst change is chronic cardiovasular funtion of aerobic endurance training
increase in maximal cardiac output
