$CATEGORY: Science - Khan Academy/6.Life Processes/6.Life Processes--Respiration

//Multiple Choice

What happens to atmospheric pressure during inhalation? {
    =It decreases
    ~It increases
    ~It remains constant
    ~It fluctuates
}

According to Boyle's Law, when the volume of a gas increases, the pressure ________. {
    ~Increases
    ~Remains constant
    =Decreases
    ~Fluctuates
}

Which of the following phases involves a decrease in lung volume and an increase in air pressure inside the lungs? {
    ~Inhalation
    =Exhalation
    ~Both a and b
    ~None of the above
}

When lung volume increases during inhalation, the air pressure inside the lungs ________. {
    ~Increases
    =Decreases
    ~Remains constant
    ~Fluctuates
}

The air pressure is defined as\: {
    =The force exerted by air molecules on a surface
    ~The temperature of the surrounding air
    ~The volume of the air inside a room
    ~The amount of oxygen in the air
}

//True or False

The random collision of particles increases the air pressure. {T}

Inhalation causes a decrease in air pressure within the lungs, drawing air from outside into the lungs. {T}

Exhalation occurs when the volume of the lungs increases and the pressure inside the lungs decreases. {F}

The air pressure inside the lungs becomes positive during inhalation. {F}

//******** END **********