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 E
Explanation
A. Tongue: The tongue assists in mechanical digestion and swallowing, making it an accessory organ.
B. Liver: The liver produces bile, aiding fat digestion, and is an accessory digestive organ.
C. Pancreas: The pancreas secretes digestive enzymes and bicarbonate, making it a key accessory organ.
D. Salivary glands: These produce saliva, initiating starch digestion-also accessory organs.
E. Spleen: The spleen is part of the lymphatic and immune system, not involved in digestion-not a digestive organ.
Correct Answer is A
Explanation
A. Hydrostatic pressure of capillary blood: This pushes water out of capillaries into the interstitial space-it's the main driver of filtration at the arterial end of capillaries.
B. Osmotic pressure of plasma proteins: This pulls water back into capillaries, opposing outward flow.
C. Hydrostatic pressure of interstitial fluid: This would oppose outward filtration if significant, but it's usually low.
D. Intracellular hydrostatic pressure: This is not relevant to capillary filtration, which occurs between plasma and interstitial fluid.
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