Mastering Ex. 37: Respiratory System Physiology

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_______ is the phase of pulmonary ventilation when air passes out of the lungs.

expiratory

Volume of air that can be forcefully exhaled after normal expiration

expiratory reserve volume

Predict the vital capacity of a 20 year old 5'5" female who weighs 120 pounds. VC= (0.041)H-(0.018)A= 2.69

3.71 L

What is the total volume of exchangeable air for a normal male?

4800ml

During normal quiet breathing, about _______ ml of air moves into and out of the lungs with each breath.

500

Dry spirometers use a turbine that rotates as air passes through it, turning a needle to indicate air volume, what values would be needed to calculate a patient's vital capacity?

ERV, TV, IRV

Which volumes are combined to provide the inspiratory capacity?

TV and IRV

Changes in pH and oxygen concentrations in the blood are monitored by chemoreceptor regions in the ______.

aortic and carotid bodies

What is the most common method of CO2 transport?

as bicarbonate ions in the plasma

Rate and depth of breathing, hyperventilation and hypoventilation should have little to no effect on the acid-base balance of blood. T/F

false

The neural centers that control respiratory rhythm and maintain a rate of 12-18 respirations per minute are located in the medulla and thalamus. T/F

false

Volume of air remaining in the lungs after a normal respiration

functional residual capacity (FRC)

The max amount of air that can be inspired after a normal expiration

inspiratory capacity (IC)

Volume of air that can be forecefully inhaled following a normal inspiration.

inspiratory reserve volume (IRV)

Volume of air remaining in the lungs after forced expiration

residual volume (RV)

What does a spirometer measure?

respiratory volumes

Volume of air inhaled or exhaled with each breathe under resting conditions

tidal volume (TV)

The max amount of air contained in the lungs after max inspiration

total lung capacity (TLC)

The maximal amount of air that can be expired after a max inspiration.

vital capacity (VC)


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