Question

In which section of the small intestine does the most chemical digestion take place?

Question options:

	Jejunum
	Ileum
	Duodenum
	Pylorus
	Cecum

Which type of cell lines the stomach?

Question options:

	Simple cuboidal epithelial cells
	Simple columnar epithelial cells
	Pseudostratified columnar epithelial cells
	Stratified columnar epithelial cells
	Simple squamous epithelial cells

Which of the following is not associated with Mechanical Digestion?

Question options:

	The teeth
	Physical break down of food
	Enzymes breaking down food
	Chewing and grinding of food
	Mastication

The small intestine absorbs what?

Question options:

	monosaccharides, amino acids, water and lipids
	proteins, carbohydrates, lipids, and water
	polysaccharides, amino acids, fatty acids, monoglycerides, and water
	proteins, monosaccharides, water, and fatty acids
	monosaccharides, amino acids, fatty acids, monoglycerides, and water

Diarrhea, nausea and abdominal cramps are symptoms associated with which of the following?

Question options:

	Vitamin C deficiency due to consumption of too few fruits and vegetables
	Vitamin depletion due to excessive soda consumption
	Vitamin C toxicity
	None of the answers are correct
	Vitamin deficiency due to cigarette smoking

Answer 1

Answer 1. C. Duodenum

It's the first, smallest part of small intestine where most of the chemical digestion takes place using enzymes in the pancreatic and Intestinal juice, and bile salts in bile. Final breakdown of carbohydrates, proteins and lipids occur here.

Answer 2. B. Simple columnar epithelial cells

Stomach is lined by mucous columnar cells, which produce thick mucous layer to protect the gastric mucosa for the acidic environment of the lumen.

Answer 3. C. Enzymes breaking down food

Rather than being a part of mechanical digestion, enzymes act as a part of chemical digestion, breaking down nutrients into smaller parts through chemical reactions. The others breakdown nutrients mechanically.

Answer 4. E. Monosaccharides, amino acids, fatty acids, monoglycerides, and water

This is because the final breakdown products of nutrients are absorbed in the small intestine, which are monosaccharides for carbohydrates, amino acids for proteins, and fatty acids and monoglycerides for fats.

Answer 5. C. Vitamin C toxicity

When vitamin C is taken in excess amounts, that's in doses higher than the Recommended Daily Allowance (RDA), symptoms of vitamin C toxicity are seen, which include diarrhoea, nausea, vomiting, heartburn, abdominal cramps, headache, insomnia, etc.