cardiovascular system Flashcards
what is the equation of cardiac output
heart rate x stroke volume
what is the definition of cardiac output
volume of blood ejected by the heart per minute
what is the definition of heart rate
number of times the heart beats per minute
what is the definition of stroke volume
volume of blood ejected from the heart per beat
how is heart rate reserve calculated
maximum hr- resting hr
how is recovery heart rate calculated
heart rate two mins after exercise - heart rate immediately after exercise
what is bradycardia
someone having a resting heart rate under 60bpm
how is maximum hr calculated
220-age
how can resting hr be measured
counting the number of times the heart beats in one min while at rest or when exercising
oxygen in transported with the body in association with
haemoglobin
myoglobin
what is haemoglobin
oxygen carrying component of red blood cells
what is myoglobin
the oxygen carrying component of the muscle tissue
what is the Bohr shift on a graph
the line shifiting to the right as the conditions within the blood become more acidic during higher intensity exercise
factors influencing the Bohr shift
increase in co2
decrease in ph
increase in temperature
what is cardiovascular drift
the increase in heart rate which occurs despite no change in the intensity of exercise
what is ateriovenous oxygen difference
(A-VO2 diff)
the difference in oxygen concentration between the arteries and veins
how can high intensity exercise result in higher A-VO2
more o2 is taken out of the arterioles to fuel muscular contractions
how can exercise impact health
lower blood pressure
lower risk of cohort heart disease
lower risk of stroke
increase blood vessel width
how can exercise impact fitness
increase gaseous exchange
increase lung volume
increase o2
increase stroke volume
increase cardiac output
