Unit 2
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Cardiovascular Adaptations?
Increased left ventricle volume, increased number of capillaries in muscles, increased arteriovenous oxygen difference, increased VO2 max
Cardiac drift?
Due to thermoregulation and decreased blood volume, stroke volume decreases so heart rate increases
pulmonary circulation?
Deoxygenated blood from right side to lungs back to left side
systemic circulation?
oxygenated blood from left side to rest of body back to right side
Sympathetic nervous system
Fight or flight, increase heart rate (adrenaline)
Parasympathetic nervous system
Rest and digest, decrease heart rate (acetylcholine)
Intrinsic regulation?
sinoatrial node, atrioventricular node, bundle of his, purkinje fibers
Role of conducting airways?
Filter, warn/moisten, low resistance pathway
Role of conducting airways?
Filter, warn/moisten, low resistance pathway
Pulmonary ventilation
Exchange of air between atmosphere and lungs (breathing)
Tidal Volume
Volume of air breathed in and out in one breath
Expiratory Reserve volume
Volume of air in excess of tidal volume that can be exhaled forcibly
Inspiratory reseve volume
additional inspired air over tidal volume
Residual volume
Volume of air still contained in lungs after maximal exhalation
Vital capacity
Maximum volume of air that can be exhaled after a maximal inhalation
Calculate vital capacity?
Tidal volume + IRV + ERV
Total lung capacity
Volume of air in the lungs after a maximum inhalation
Calculate total lung capacity?
Vital capacity + residual volume
Systolic Blood Pressure
The force exerted by blood on arterial walls during ventricular contraction
Diastolic Blood Pressure
The force exerted by blood on the arterial walls during ventricular relaxation
VO2 Max?
Maximum amount of oxygen the body can utilize during exercise