A nursing infant develops a powerful sucking muscle that adults also use for whistling. What is this muscle called?
A) platysma
B) masseter
C) zygomaticus
D) buccinator
D) buccinator
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A skeletal muscle fiber contains many nuclei.
Answer the following statement true (T) or false (F)
All inorganic molecules contain carbon.
Answer the following statement true (T) or false (F)
All of the following are true regarding carbonic anhydrase except that
A) it is in RBCs. B) it is an enzyme. C) it can increase the amount of bicarbonate ion in plasma. D) it can convert carbon dioxide into carbonic acid. E) it can convert carbonic acid into CO2.
Select the statement that correctly describes the differences between specific and nonspecific immunity.
A. Specific immunity is provided by epithelial tissues. B. Only cells and tissues of both types of immunity express receptors for specific pathogens. C. Nonspecific immunity is innate and genetically determined. D. Nonspecific immunity relies on proper functioning of specific immunity for activation and recognition of pathogens.