The carotid bodies contain ________ chemoreceptors that respond to changes in ________.
A. peripheral; concentrations of carbon, dust, and pollution in the lungs
B. central; blood concentrations of H+, but not CO2 and O2
C. peripheral; cerebrospinal fluid concentrations of H+
D. peripheral; blood concentrations of H+ and O2
E. central; cerebrospinal concentrations of CO2
Answer: D
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a. neutrophilia b. lymphoma c. sickle cell anemia d. malaria e. leukemia
Physiological dead air space is anatomic dead space plus
A. tidal volume. B. the residual volume. C. the volume of blood flowing to the lungs. D. the respiration rate. E. the volume of any alveoli where gas exchange is diminished.
Which of the following represents a segment of RNA?
A) AUGUCA B) ATGCTA C) TGCGTT D) CTGTGG E) GTCATA
Male infertility (sterility) refers to ________
A) low levels of testosterone B) a lack of seminal fluid during ejaculation C) the inability to fertilize an egg D) low sperm count E) the inability to have an erection