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The surface of the tongue is covered with

and has bumps called stratified squamous epithelium, where many taste buds can be found.
Answer and Explanation

The Correct Answer is {"dropdown-group-1":"A","dropdown-group-2":"A"}

A. Keratinized; lingual papillae: The dorsal surface of the tongue is lined with keratinized stratified squamous epithelium, especially in areas subject to friction, and contains lingual papillae that house taste buds.
B. Keratinized; lingual frenulum: The lingual frenulum is the fold under the tongue, not a bump or papilla.
C. Nonkeratinized; lingual papillae: The top of the tongue is typically keratinized, not nonkeratinized, due to exposure to friction.
D. Nonkeratinized; tonsils: Tonsils are not part of the tongue's surface epithelium and don’t contain taste buds.
E. Nonkeratinized; vallate papillae: Vallate papillae are a type of lingual papillae, but the overall surface is keratinized, not nonkeratinized.


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Related Questions

Correct Answer is E

Explanation

A. 2 ATP: This is the ATP yield from glycolysis (net gain), not fatty acid oxidation.
B. 18 ATP: Too low for a 16-carbon fatty acid-this number is far below the actual ATP yield from fatty acid metabolism.
C. 36 ATP: This is the approximate ATP yield from glucose oxidation, not a 16-carbon fatty acid.
D. 38 ATP: Also close to glucose metabolism; still too low.
E. 129 ATP: Beta-oxidation of a 16-carbon fatty acid (e.g., palmitic acid) generates 129 ATP molecules, making it far more energy-dense than glucose.

Correct Answer is A

Explanation

A. Nitrogen: Nitrogen is a gas and a component of proteins and nucleic acids, but it does not function as a buffer system in the body.
B. Bicarbonate: The bicarbonate buffer system is the primary buffer system in the extracellular fluid, regulating blood pH.
C. Phosphate: The phosphate buffer system operates mainly in the intracellular fluid and renal tubules.
D. Protein: Proteins, especially hemoglobin, act as buffers by binding or releasing hydrogen ions.

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