Nokea
Match: Protein
- A. composed of amino acids; building blocks for body tissues
- B. major source of energy
- C. used for insulation
- D. stored as glycogen
Correct Answer: A
Rationale: Proteins are macromolecules composed of amino acids, essential for building and repairing body tissues.
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Blood from the intestines travels to the liver via the:
- A. hepatic artery
- B. mesenteric artery
- C. hepatic vein
- D. hepatic portal vein
Correct Answer: D
Rationale: The hepatic portal vein carries nutrient-rich blood from the intestines to the liver for processing before it enters systemic circulation.
Which process matches the definition: Rhythmic contraction and relaxation of smooth muscle that propel food along the digestive tract?
- A. Ingestion
- B. Peristalsis
- C. Assimilation
- D. Absorption
Correct Answer: B
Rationale: Peristalsis is the rhythmic muscular action that moves food through the digestive tract.
Four bags made of partially permeable membrane are placed in tubes as shown in the diagram. bag made of partially permable membrane starch solution water reducing sugar solution water starch solution and saliva water tube 1 tube 2 tube 3 tube 4 saliva water After 20 minutes at 35 oC a sample of water from each tube, outside the bag, is boiled with Benedict's solution. What are the results?
- A. tube 1: blue, tube 2: red, tube 3: blue, tube 4: red
- B. tube 1: blue, tube 2: blue, tube 3: red, tube 4: red
- C. tube 1: red, tube 2: blue, tube 3: blue, tube 4: red
- D. tube 1: red, tube 2: red, tube 3: blue, tube 4: blue
Correct Answer: A
Rationale: Only reducing sugars can pass through the membrane, turning Benedict's solution red, while starch cannot.
One of the following is not a constituent of saliva:-
- A. Bicarbonate
- B. Lysozyme
- C. Glucose
- D. Immunoglobulin
Correct Answer: C
Rationale: Saliva does not contain glucose; it includes bicarbonate, lysozyme, and immunoglobulins.
The following cells are involved in lipid digestion & absorption EXCEPT:
- A. Parotid acini
- B. Liver cells (hepatocytes)
- C. Pancreatic acini
- D. Chief cells of fundic glands
Correct Answer: A
Rationale: Parotid acini produce saliva, which begins carbohydrate digestion, not lipid digestion; hepatocytes and pancreatic acini produce bile and lipase for lipids.