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WHS Breathing Regulation
medulla, pons, breathing rate and depth
17
Physiology
12th Grade
10/27/2010

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Term
HCO3- binds to H+ and takes it out of the blood. It's the H+ that makes the blood acidic.
Definition
How does HCO3- help buffer the blood?
Term
quickly
Definition
If you are breathing faster, the PA is firing off impulses more (quickly/slowly)?
Term
CO2 and H+
Definition
What factors most determine the rate of breathing?
Term
Dorsal group and normal breathing rate
Definition
The pons regulates which part of the MRA?
Term
external intercostals, internal intercostals, pectoralis minor, sternocleidomastoid
Definition
The ventral group would control which muscles?
Term
Dorsal respiratory group
Definition
This maintains the normal rhythm of breathing.
Term
digestion of food (amino acids, fatty acids. .) acidic food/drink, lactic acid production, excess CO2
Definition
What are some factors that can cause blood pH to go down?
Term
pneumotaxic area and the medullary rhythmicity area
Definition
What are the two parts of the respiratory center?
Term
CO2 and H+ receptors
Definition
What chemoreceptors are located in the medulla?
Term
When you breathe rapidly and deeply and release too much CO2.
Definition
What is hyperventilation?
Term
When you are breathing too slowly and CO2 is accumulating in the blood.
Definition
What is hypoventilation?
Term
stretch receptors in the lung tissue fire when they are stretched, and then the resp. center tells muscles to relax, so they don't overinflate the lungs.
Definition
What keeps the lungs from overinflating?
Term
phrenic nerve
Definition
What nerve tells the diaphragm to contract?
Term
ventral group
Definition
This maintains the forcefullness or depth of breathing.
Term
Carotid arteries and aorta
Definition
Where is O2 concentrations measured?
Term
pons
Definition
Where is the pneumotaxic area?
Term
blood CO2 levels decrease and the pH goes up. The rise in blood pH causes vasoconstriciton of carotid arteries and less O2 reaches the brain.
Definition
Why do you faint when you hyperventilate?
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