When the chest cavity has been penetrated, as in a pneumothorax, the amount of air in the respiratory system is reduced to the
E)inspiratory reserve volume.
How does fluid accumulation in the lungs affect vital capacity?
A)Vital capacity increases in females but not in males.
B)Vital capacity decreases in females but not in males.
C)Vital capacity increases in both sexes equally.
D)Vital capacity decreases in both sexes equally.
E)Accumulating fluid has no effect on vital capacity.
A)pressure inside the lungs is less than the outside pressure.
B)pressure within the thoracic cavity decreases.
C)inside and outside pressures are equal.
D)the volume of the thoracic cavity increases.
E)the volume of the thoracic cavity decreases.
Which statement regarding respiration is true?
A)The sternocleidomastoid muscle elevates the rib cage.
B)Internal intercostal muscles elevate the rib cage.
C)The rectus abdominis muscle elevates the rib cage.
D)The external intercostal muscles lower the rib cage.
E)Elevation of the rib cage decreases the volume of the thoracic cavity.