The airway from the nose to the larynx is classified as the __________ respiratory tract.
Fill in the blank(s) with the appropriate word(s).
upper
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Blood O2 levels
A. within the normal PO2 range have little effect on regulation of respiration. B. never change enough to influence respiration. C. are more important than CO2 levels in the regulation of respiration. D. in venous blood and arterial blood are about the same. E. need to change only slightly to cause a change in respiration rate.
Boyle's law explains that _________.
A. at higher temperatures gases are more compressed B. gases under low pressure have a lower volume C. gases are least soluble when they are in liquid D. the pressure of a gas varies inversely with its volume
What are the eyes doing when the desynchronization of the alpha rhythm occurs?
A) The pupils are unevenly dilating. B) The eyes begin to focus on two different objects. C) The eyes are opening. D) The eyes are closing.
What part of the spleen serves as a reservoir for lymphocytes and macrophages?
A. Both red and white pulp B. Red pulp C. White pulp D. None of these are correct.