Surfactant is a surface-active agent in water, which means that it greatly increases the surface tension of water.

The normal residual volume is 3500 ml.

The maximum amount of air a person can expel from the lungs after first filling the lungs to their maximum extent and then expiring to the maximum extent is FUNCTIONAL RESIDUAL CAPACITY.

The extra volume of air that can be inspired over and above the normal tidal volume when a person expires with full force is 3000 mL.

The total amount of new air moved into the respiratory passages each minute is about 6 L/min.

A normal healthy individual has equal anatomic and physiologic dead space because all alveoli are functional in a normal lung.

LUB is heard during diastole.

Murmurs due to aortic stenosis is usually heard during systole.

During protodiastole, there is a rapid decrease in the ventricular pressure as the ventricles are fully contracted.

The pulse pressure of a BP of 150/80 is within the normal allowable range.

The mean arterial pressure of 150/80 is 103 mmHg.

The Frank-Starling law states that an increase in atrial pressure also causes an increase in heart rate, sometimes increasing it to as much as 75% .

The stroke volume of an aerobically trained person is less due to the efficiency of the heart when contracting.

Heart maximum increases by at least 10% of the baseline heart rate when exercising at maximal instensity.

Long term aerobic exercise can decrease the resting blood pressure by inducing vasodilation that decreases the peripheral resistance.

When exercising patients who underwent coronary artery bypass graft, UE exercises are preferred over large LE muscle exercises.

Heart rate is a good measure of intensity for those who are on beta-blockers.

After sufficient amount of aerobic training, the MVO2 usually decreases at rest.

Cardiac output increases only during maximal exercise of an aerobically trained athlete.