What has the primary responsibility for sensing and responding to changes in blood levels of CO2?
a. Apneustic centers
b. Central chemoreceptors
c. Peripheral chemoreceptors
d. Pneumotaxic center
ANS: B
Hydrogen ions stimulate highly responsive chemosensitive nerve cells, located bilaterally in the medulla. Nevertheless, these central chemoreceptors are extremely sensitive to CO2 in an indirect fashion. Through the hydrolysis reaction, as CO2 increases there is a greater release of hydrogen ions to which the chemoreceptors respond.
You might also like to view...
Sharp dissection is performed with _______ or fine Metzenbaum scissors and toothed tissue forceps
A. tenotomy B. Mayo
Ordered: Lidocaine 500 milligrams sub-Q On hand: Lidocaine 300 milligrams in 3 milliliters Give: ________
Fill in the blank(s) with the appropriate word(s).
Incident reports are filed and maintained with the patient record
A) True B) False
Explorers have which of the following characteristics?
They can be used to remove calculus on the interproximal surfaces of the teeth. They are not used in diagnosis. They are useful in detecting subtle anomalies in tooth structures. They have a knife-like working end.