Questions and Answers
Which enzyme is primarily secreted by the pancreas to aid in fat digestion?
Hydrochloric acid in the stomach helps to denature proteins and activate digestive enzymes.
True
What is the role of amylase in digestion?
To break down carbohydrates into sugars.
The enzyme maltase acts on __________ to produce glucose.
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Match the following enzymes with their corresponding substrates:
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Which of the following is NOT a substance secreted into the alimentary canal for digestion?
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Pepsin is secreted by the salivary glands.
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Name one organ where pepsin is secreted.
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The products of digestion involving pepsin are __________.
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Match the following enzymes with their place of secretion:
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Study Notes
Human Alimentary Canal Diagram
- Diagram shows the human alimentary canal and associated organs.
- Key organs involved in digestion include the salivary glands, stomach, pancreas, and small intestine.
Enzymes and Their Functions
- Enzymes play a crucial role in breaking down food substances.
- Amylase is secreted by the salivary glands to break down starch into maltose.
- Lipase, produced by the pancreas, helps digest fats into fatty acids and glycerol.
- Pepsin, secreted by the stomach, digests proteins into amino acids.
- Maltase, located in the small intestinal lining, converts maltose into glucose.
Role of Hydrochloric Acid
- Hydrochloric acid aids digestion by providing an acidic environment for pepsin activation.
- It helps kill pathogens ingested with food and assists in the absorption of vital nutrients.
Additional Digestive Substances
- Besides enzymes, other substances important for digestion include bile and mucus.
- Bile, produced in the liver, emulsifies fats for better enzyme action.
Importance of Lactase in Infants
- Lactase is essential for breaking down lactose in milk, providing necessary nutrients for young babies.
- It supports healthy growth and development by facilitating the absorption of milk sugars.
Symptoms of Diarrhoea
- Diarrhoea symptoms can include frequent, watery stools, abdominal cramps, dehydration, and electrolyte imbalances.
- In adults, lack of lactase can lead to discomfort and digestive issues after consuming milk.
Role of Protease Enzymes
- Protease enzymes (A and B) break down proteins into smaller peptides and amino acids.
- They function optimally in different pH levels within the alimentary canal, contributing to effective protein digestion.
Location of Maltase
- Maltase is found in the lining of the small intestine, where it acts on maltose.
Bile in Digestion
- Bile is produced in the liver and stored in the gall bladder, facilitating fat digestion when released into the small intestine.
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Description
This worksheet focuses on the human alimentary canal and its associated organs. It includes diagrams and prompts for understanding animal nutrition. Explore how different components aid in digestion and nutrient absorption.
