Saturday, January 16, 2010

I need a feedback loop indicating how the rate and depth of breathing control pH of Blood!?

I have a diagram to fill out, so I need receptors, a control center, effectors, and a normal.I need a feedback loop indicating how the rate and depth of breathing control pH of Blood!?
Unconsciously, breathing is controlled by specialized centers in the brainstem, which automatically regulate the rate and depth of breathing depending on the body鈥檚 needs at any time. When carbon dioxide levels increase in the blood, it reacts with the water in blood, producing carbonic acid. Lactic acid produced by anaerobic exercise also lowers pH. The drop in the blood's pH stimulates CHEMORECEPTORS in the carotid and aortic bodies in the blood system to send nerve impulses to the respiration centre (=CONTROL CENTRE) in the medulla oblongata and pons in the brain. These, in turn send nerve impulses through the phrenic and thoracic nerves to the diaphragm and the intercostal muscles (EFFECTORS), increasing the rate of breathing. This automatic control of respiration can be impaired in premature babies, or by drugs or disease.





http://www.kofutu.com/Links/Breathing_Th鈥?/a>

No comments:

Post a Comment