Human Nutrition
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Preview questions (no answers)
- 1.
Among the main macronutrients, which one provides the most concentrated source of energy, yielding approximately per gram?
A.Proteins
B.Carbohydrates
C.Vitamins
D.Fats (Lipids)
- 2.
Which of the following food sources provides the highest concentration of Calcium, necessary for the development of strong bones and teeth?
A.Dairy products like milk and cheese
B.Citrus fruits like oranges and lemons
C.Red meats like beef and lamb
D.Polished white rice and pasta
- 3.
A deficiency in Vitamin C leads to a condition called scurvy. Which symptom is most commonly associated with this deficiency?
A.Softening of the bones leading to bowed legs.
B.Inability to see clearly in low light (night blindness).
C.Bleeding gums and poor wound healing.
D.Reduced number of red blood cells leading to fatigue.
Download the worksheet for Human Nutrition - Balanced diet to practice offline. It includes additional chapter-level practice questions.
Alimentary canal
SubtopicAlimentary canal under Human Nutrition for Grade 12 IGCSE.
Preview questions (no answers)
- 1.
In which organs of the human alimentary canal are proteases (enzymes that digest proteins) primarily produced and secreted?
A.Stomach and Pancreas
B.Liver and Gallbladder
C.Salivary Glands and Esophagus
D.Large Intestine and Rectum
- 2.
Which specific part of the alimentary canal is the primary site where the majority of water is reabsorbed from undigested food material?
A.Stomach
B.Duodenum
C.Large Intestine
D.Ileum
- 3.
Which of the following best describes the primary biological role of bile in the digestion of lipids?
A.To chemically break down triglycerides into glycerol and fatty acids
B.To provide an acidic environment for lipase to function
C.To emulsify large fat globules into smaller droplets to increase surface area
D.To transport absorbed lipids from the small intestine to the liver
Download the worksheet for Human Nutrition - Alimentary canal to practice offline. It includes additional chapter-level practice questions.
Mechanical and chemical digestion
SubtopicMechanical and chemical digestion under Human Nutrition for Grade 12 IGCSE.
Preview questions (no answers)
- 1.
Hydrochloric acid in the stomach provides the optimum for the activity of which enzyme?
A.Salivary amylase
B.Pepsin
C.Trypsin
D.Pancreatic lipase
- 2.
In which part of the digestive system does the process of 'churning' occur to facilitate mechanical digestion?
A.A
B.B
C.C
D.D
- 3.
Which enzyme is responsible for the chemical digestion of fats (lipids) into fatty acids and glycerol?
A.Amylase
B.Protease
C.Lipase
D.Maltase
Download the worksheet for Human Nutrition - Mechanical and chemical digestion to practice offline. It includes additional chapter-level practice questions.
Absorption and assimilation
SubtopicAbsorption and assimilation under Human Nutrition for Grade 12 IGCSE.
Preview questions (no answers)
- 1.
Which process refers to the movement of digested food molecules into the cells of the body where they are used, becoming part of the cells?
A.Assimilation
B.Ingestion
C.Egestion
D.Digestion
- 2.
Which of these nutrients is absorbed into the lacteals of the villi rather than the blood capillaries?
A.Glucose
B.Amino acids
C.Vitamin C
D.Fats
- 3.
What is the primary function of the villi located in the small intestine?
A.To produce digestive enzymes like amylase
B.To increase the surface area for efficient absorption
C.To secrete bile into the duodenum
D.To move food along the gut using peristalsis
Download the worksheet for Human Nutrition - Absorption and assimilation to practice offline. It includes additional chapter-level practice questions.