Sympathetic activation leads to
A) relaxation in skeletal muscle of bronchioles, causing bronchodilation.
B) contraction of smooth muscles of bronchioles, causing bronchoconstriction.
C) relaxation in smooth muscles of bronchioles, causing bronchodilation.
D) relaxation of smooth muscles of bronchioles, resulting in bronchoconstriction.
E) contraction of smooth muscles of bronchioles, causing bronchodilation.
C) relaxation in smooth muscles of bronchioles, causing bronchodilation.
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Tonsils have blind-ended structures called ________.
Fill in the blank(s) with the appropriate word(s).
Homeostatic mechanisms that monitor and adjust the composition of body fluids respond to changes in the
A) intracellular fluid. B) plasma membrane. C) extracellular fluid. D) solid components. E) cytosol.
Which type of cell is the most effective to attack multicellular parasites such as tapeworms?
A. Basophils B. Eosinophils C. Macrophages D. Neutrophils
Which of the following contains a crystalline form of calcium phosphate and is the hardest biologically manufactured substance?
A) enamel B) cementum C) dentin D) pulp E) periodontium