ch 29 pt 2

which of the following is false?

• Apneustic area impulses originating in the pons are received continuously as excitatory impulses in the DRG's inspiratory center

• Apneustic area impulses originating in the pons are received continuously as excitatory impulses in the VRG's inspiratory center

• Stimulating the pneumotaxic area results in a cessation of inhalation.

• The pneumotaxic area is inhibitory in its effect on the brain’s inspiratory center.

during inhalation, ____ drops below _____.

• intrapulmonary pressure; atmospheric pressure

• atmospheric pressure; intrapulmonary pressure

• atmospheric pressure; intraalveolar pressure

which of the following are true?

• Phrenic nerves are more important in causing a decrease in thoracic pressure than an increase.

• Phrenic nerves are more important in causing an increase in thoracic pressure than a decrease.

• impulses along the phrenic nerve are from the inspiratory center, promoting inhalation

• impulses conducted along phrenic nerves would promote an increase in thoracic cavity volume.

what is true about henry's law?

• The amount of O2 that will dissolve in blood plasma is positively correlated to the pO2 inside the alveoli.

• The amount of O2 that will dissolve in blood plasma is negatively correlated to the pO2 inside the alveoli.

• Henry’s law relates to how the partial pressure and solubility of a gas affect the concentration of that gas in a liquid.

• Henry's law relates more to the effect of temperature on gas volume than does Charles' law.

choose the correct pairing:

• VRG: restful inhalation

• apneustic area: excitatory effect on DRG

• posterior cricoarytenoid: increased voice pitch

• lateral cricoarytenoid: increased glottis diameter

which of the following is false?

• The Hering-Breuer reflex prevents over-inflation of the lungs

• A person’s breathing rate has a negative effect on blood pH.

• The Hering-Breuer reflex involves stimulation of the pneumotaxic area.

• Increased carotid body activity would likely result in an increase in breathing rate.