Which of the following is the correct list of tooth anatomy from the most superficial to the deepest?
Cement, root canal, enamel
Enamel, root canal, dentin
Dentin, enamel, cement
Enamel, dentin, pulp
Crown, enamel, dentin
The Correct Answer is D
A. Cement, root canal, enamel: Cement covers the root, not the outermost crown, and enamel is actually the most superficial layer of the crown, not root canal.
B. Enamel, root canal, dentin: Dentin lies between enamel and the pulp/root canal, so this order is incorrect.
C. Dentin, enamel, cement: Enamel is above dentin; cement is part of the root, not the crown.
D. Enamel, dentin, pulp: Enamel is the outermost protective layer, dentin is beneath it, and pulp is the innermost part containing nerves and blood vessels.
E. Crown, enamel, dentin: The crown is a region, not a tissue. The question asked for tissue layers, not anatomical regions.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Decreased urine volume: ADH increases water reabsorption in the collecting ducts, leading to less water in the urine and decreased urine output.
B. Decreased urine molarity: ADH leads to more concentrated (higher molarity) urine, not less.
C. Increased urine volume: ADH reduces urine volume, not increases it.
D. Increased urine salinity: ADH affects water, not salt. Salinity may change indirectly, but this is not a direct effect.
E. Increased urine acidity: Urine acidity is influenced by hydrogen ion excretion, not directly by ADH.
Correct Answer is B
Explanation
A. Lipid absorption: Absorption occurs in the small intestine after fats have been digested into smaller molecules. Bile salts do not absorb lipids directly.
B. Lipid emulsification: Bile salts break large fat globules into smaller droplets in a process called emulsification, which increases the surface area for digestive enzymes like lipase to act.
C. Lipid ingestion: Ingestion refers to eating, not the chemical processing of fats.
D. Lipid digestion: Digestion is primarily performed by lipase, not bile salts. Bile salts prepare fats for digestion.
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