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PT 639 Physiology Review Quiz
Terms in this set (26)
Predominant fuel source for high-intensity exercise
blood glucose and muscle glycogen
Formula for stroke volume (SV)?
This is NOT a determinant of stroke volume (SV)?
a. volume of arterial blood returned to the heart
b. ventricular distensibility
c. ventricular contractility
d. aortic or pulmonary artery pressure
volume of arterial blood returned to the heart
Describe the Frank Starling curve
red: decreased afterload, increased contractility
blue: increased afterload, decreased contractility
Cardiac output formula (CO or Q)
HR X SV
Atrial kick contributes to appx __ % of cardiac output
What is the formula for percent ejection fraction?
SV/EDV x 100%
Formula for mean atrial pressure (MAP)
DBP + [1/3 * (SBP+DBP)]
What is an indirect index of myocardial oxygen demand? What is the formula?
A. End-Systolic Volume (ESV)
B. Stroke Volume (SV)
C. Rate Pressure Product (RPP)
D. Pulse Pressure (PP)
RPP = HR x SBP
What are the blood pressure categories?
With submax exercise how does SBP and DBP respond?
SBP rises proportionately
DBP is unchanged or slightly decreased
Formula for oxygen consumption (VO2)
CO x a-VO2 difference
Is the red line a trained, untrained, or elite athlete?
With adaptation to aerobic training, how does submaximal SBP change?
submax SBP lower at any given exercise intensity
The SA node is an (intrinsic/extrinsic) controller of the heart and fires at a rate of ___ bpm.
intrinsic, 60-100 bpm
The endocrine system releases catecholamines to (increase/decrease( HR and contractility
What is the accurate formula for maxHR?
208 - (0.7 x age)
What is the leading cause of death in the US
Although hypotheses about the
development of atherosclerosis differ,
what is the common cri=cal trigger in
the development of plaque formation?
LDL cholesterol (results in endothelial damage and local inflammation)
Chronic lower respiratory diseases are the __ leading cause of death in the US
Number of bronchopulmonary segments in each lung
Normal PaO2, PaCO2, pH, and HCO3-
Which pulmonary function test result is more reflective of mild to moderate obstructive disease?
Describe PFT patterns in normal, obstructive and restrictive lung disease
increased FEV1/FVC indicates a (restrictive/obstructive) disorder
decreased FEV1/FVC indicates a (restrictive/obstructive) disorder
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