The medulla oblongata originates from which structure?
A. Metencephalon
B. Diencephalon
C. Mesencephalon
D. Myelencephalon
E. Telencephalon
Answer: D
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Respiratory acidosis results when lungs are obstructed and gas exchange is inefficient
Indicate whether the statement is true or false
Hemoglobin
a. plays a critical role in determining the total amount of O2 that is exchanged because it acts as a storage depot, removing dissolved O2 and thus keeping the PO2 low so that net diffusion is allowed to continue. b. combines only with O2. c. is found in erythrocytes. d. both (a) and (c) above. e. all of these answers.
Men tend to have deeper voices than women because their vocal cords _______.
A. have a wider opening B. are shorter and narrower C. have a narrower opening D. are longer and thicker
All of the following are true of neural reflexes except that they
A) are automatic motor responses. B) are the simplest form of behavior. C) help preserve homeostasis. D) usually cannot be suppressed by the brain. E) involve at least two neurons.