Which of the following is a function of bile?

Correct Answer: B

Rationale: Bile, produced by the liver, emulsifies fats, breaking them into smaller droplets to increase surface area for digestion by lipases.

Correct Answer: A

Rationale: The liver produces bile to emulsify fats, among other functions like detoxification and nutrient metabolism.

Correct Answer: A

Rationale: The vermilion zone is covered by modified skin, not a mucous membrane, though it lacks skin appendages and has a thin keratin layer.

Correct Answer: C

Rationale: The ventral surface of the tongue is smooth and covered by non-keratinized stratified squamous epithelium, not lingual papillae, which are on the dorsal surface.

Correct Answer: C

Rationale: GERD is caused by a weakened lower esophageal sphincter, allowing gastric juice to reflux, causing heartburn.