Aging of the brain begins
A) at age 30. B) before birth. C) at birth. D) after age 50.
B
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The bulk of each tooth consists of a mineralized matrix similar to that of bone called
A) enamel. B) cement. C) dentin. D) pulp. E) periodontium.
What is the condition that results from poor nutrition, lack of nutrients, or the failure to use them?
A. Malnutrition B. Malabsorption C. Food intolerance D. Food allergy E. Adequate nutrition
The ________ helps hold a tooth in its socket.
A. periodontal ligament B. crown C. pulp cavity D. alveoli E. dental arch
Which is TRUE about the resting membrane potential?
A. It requires very few ions to be distributed unevenly. B. It has the same value in all cells. C. It is oriented so that the cell's interior is positive with respect to the extracellular fluid. D. Only nerve and muscle cells have a potential difference across the membrane at rest. E. It is not altered by changing concentration gradients of permeating ions.