Which respiratory control center sets basic breathing rate by acting as the primary stimulator of
inhalation?
a. the ventral interneuron group
b. the pons interneuron groups
c. the carotid bodies
d. the dorsal respiratory group
e. the aortic bodies
D
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In the 1930s Kluyver and van Niel proposed a classification scheme based on
A. Gram reactions. B. biochemical relationships. C. presumed evolutionary relationships. D. DNA sequences.
The self-splicing of Group I introns
a. requires energy from the hydrolysis of ATP. b. gains energy from exergonic reactions involving inorganic compounds. c. occurs in a series of transesterifications that require no hydrolysis for energy. d. requires energy from the hydrolysis of GTP. e. gains energy directly from an electron transport chain.
Which cell type is phagocytic and can migrate out into body tissues to differentiate into macrophages?
A. basophils B. lymphocytes C. neutrophils D. monocytes E. eosinophils
Glass is a solid that is not crystalline, but rather an ____ solid.
What will be an ideal response?