Questions About Digestive System

Questions About Digestive System Related

Review Questions About Digestive System related questions and content

An investigation is carried out on digestion and absorption in the alimentary canal. The diagram shows the apparatus used. The visking tubing is permeable to small molecules such as glucose but not to large molecules such as starch. beaker water starch solution and amylase visking tubing glass rod to support visking tubing After one hour, samples of water in the beaker are tested with Benedict's solution and with iodine solution. Which colours are obtained?

  • A. blue with Benedict's, blue-black with iodine
  • B. blue with Benedict's, yellow-brown with iodine
  • C. red with Benedict's, blue-black with iodine
  • D. red with Benedict's, yellow-brown with iodine
Correct Answer: D

Rationale: Starch is broken down to glucose, which passes through the visking tubing, giving a positive Benedict's test (red), while iodine remains negative as starch cannot pass through.

You may also like to solve these questions

The liver contains macrophages that have a special name. What is this name?

  • A. Lymphocytes
  • B. Coffee cells
  • C. Kupffer cells
  • D. Liver macrophage
Correct Answer: C

Rationale: Kupffer cells are specialized macrophages in the liver that remove debris and pathogens from the blood. Lymphocytes are white blood cells, and 'coffee cells' is not a term; 'liver macrophage' is less specific than Kupffer cells.

Amylase in saliva initiates digestion of:

  • A. lipids
  • B. proteins
  • C. fats
  • D. carbohydrates
Correct Answer: D

Rationale: Salivary amylase breaks down carbohydrates into simpler sugars.

An older adult client asks the nurse why laxatives are frequently required to have a bowel movement. The nurse bases the response to this question on knowledge that:

  • A. Older adults frequently abuse laxatives
  • B. Laxatives are very often contraindicated in the older population
  • C. Enemas are preferred over laxatives to evacuate the bowel
  • D. Decreased bowel peristalsis is common in older adults
Correct Answer: D

Rationale: Aging often reduces peristalsis, slowing bowel movements and increasing the need for laxatives.

All of the following are true of the stomach EXCEPT?

  • A. Pepsinogen is activated to pepsin by HCl
  • B. Parietal cells secrete intrinsic factor
  • C. Chief cells secrete pepsinogen
  • D. The pyloric region is a major site for nutrient absorption
Correct Answer: D

Rationale: The pyloric region primarily functions as a regulator of food movement into the small intestine, not as a major site for nutrient absorption.

Match: Duodenum

  • A. initial section of the small intestine where most chemical digestion occurs
  • B. stores bile
  • C. secretes insulin
  • D. absorbs water
Correct Answer: A

Rationale: The duodenum is the first part of the small intestine where most chemical digestion takes place.

Copyright © 2025 Nokea. All rights reserved.