Gr 9 NATURAL SCIENCES: CH 1.5 SUM Digestive System
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Questions and Answers

What are the seven essential groups that constitute a healthy diet?

  • Proteins, Carbohydrates, Fats and Oils, Vitamins, Minerals, Fibre, and Water (correct)
  • Proteins, Carbohydrates, Fats and Oils, Vitamins, Minerals, Fibre, and Air
  • Proteins, Carbohydrates, Fats and Oils, Vitamins, Minerals, Fibre, and Sugar
  • Proteins, Carbohydrates, Fats and Oils, Vitamins, Minerals, Fibre, and Salt

    • What is the primary function of carbohydrates in the body?

  • To provide energy to the body (correct)
  • To protect and insulate organs
  • To build and repair body cells and tissues
  • To maintain healthy hair and nails

    • What are healthy fats found in?

  • Chips and pastries
  • Soft drinks and sweetened fruit juices
  • Olive oil, canola oil, and sardines (correct)
  • Sweets and biscuits

    • What is the role of vitamins in the body?

    <p>To help in various chemical reactions</p> Signup and view all the answers

    What is the importance of proteins in the body?

    <p>To build and repair body cells and tissues</p> Signup and view all the answers

    What are plant-based sources of protein?

    <p>Soya beans, peas, beans, nuts, and seeds</p> Signup and view all the answers

    What is the function of fibre in the body?

    <p>Non-digestible carbohydrates</p> Signup and view all the answers

    What is the importance of water in a healthy diet?

    <p>One of the seven essential groups that constitute a healthy diet</p> Signup and view all the answers

    What is the role of vitamins in the body, according to Vitamin A?

    <p>To strengthen the immune system and support eyesight</p> Signup and view all the answers

    What should be done when consuming carbohydrates?

    <p>Moderate the intake of processed carbohydrates</p> Signup and view all the answers

    Where does the majority of digestion and nutrient absorption occur?

    <p>Small Intestine</p> Signup and view all the answers

    What is the primary function of the large intestine?

    <p>To absorb water and salts from indigestible food matter</p> Signup and view all the answers

    What is the function of villi and microvilli in the small intestine?

    <p>To increase the surface area for absorption</p> Signup and view all the answers

    What is the process that moves food through the alimentary canal?

    <p>Peristalsis</p> Signup and view all the answers

    Which enzyme breaks down carbohydrates?

    <p>Amylase</p> Signup and view all the answers

    What is the primary location for nutrient absorption?

    <p>Small Intestine</p> Signup and view all the answers

    What is the process of expelling undigested and unabsorbed food from the body?

    <p>Egestion</p> Signup and view all the answers

    What is the role of enzymes in digestion?

    <p>To break down nutrients</p> Signup and view all the answers

    What is stored in the rectum?

    <p>Feces</p> Signup and view all the answers

    Which of the following is NOT a function of the small intestine?

    <p>Storage of feces</p> Signup and view all the answers

    What is the main function of vitamin C in the human body?

    <p>Keeping skin and gums healthy and boosting the immune system</p> Signup and view all the answers

    Which mineral is essential for strong bones and teeth?

    <p>Calcium</p> Signup and view all the answers

    What is the main function of fibre in the human body?

    <p>Maintaining regular bowel movements and preventing constipation</p> Signup and view all the answers

    What is the approximate percentage of water in the human body?

    <p>50%</p> Signup and view all the answers

    What is the purpose of the starch test in food testing?

    <p>Identifying the presence of starch</p> Signup and view all the answers

    What is the result of poor dietary choices?

    <p>Health issues such as obesity, malnutrition, and chronic diseases</p> Signup and view all the answers

    What is the name of the process that transforms food into small molecules that can be absorbed and transported to the body's cells?

    <p>Digestion</p> Signup and view all the answers

    What type of digestion occurs in the mouth?

    <p>Both mechanical and chemical digestion</p> Signup and view all the answers

    What is the function of the oesophagus in the alimentary canal?

    <p>Moving food from the mouth to the stomach through peristalsis</p> Signup and view all the answers

    What is the function of gastric juices in the stomach?

    <p>Secreting enzymes and hydrochloric acid to facilitate chemical digestion</p> Signup and view all the answers

    What is the primary function of vitamin D in the body?

    <p>Building strong bones and teeth</p> Signup and view all the answers

    Which of the following is a source of magnesium?

    <p>Bananas and nuts</p> Signup and view all the answers

    What is the primary function of fibre in the diet?

    <p>Maintaining regular bowel movements and preventing constipation</p> Signup and view all the answers

    What is the purpose of the emulsion test in food testing?

    <p>To detect the presence of fats and oils</p> Signup and view all the answers

    What is the main function of proteins in the human body?

    <p>To build and repair body cells and tissues</p> Signup and view all the answers

    What is the result of not drinking enough water daily?

    <p>Dehydration and poor bodily functions</p> Signup and view all the answers

    Why is it important to moderate the intake of processed carbohydrates?

    <p>Because they can lead to health problems if consumed excessively</p> Signup and view all the answers

    Which part of the alimentary canal is responsible for mechanical digestion?

    <p>Stomach</p> Signup and view all the answers

    What type of digestion occurs in the stomach?

    <p>Both mechanical and chemical digestion</p> Signup and view all the answers

    What is the role of fats and oils in the body?

    <p>To protect and insulate organs, and absorb and transport certain vitamins</p> Signup and view all the answers

    What is the function of vitamin A?

    <p>To strengthen the immune system and aid eyesight</p> Signup and view all the answers

    What is the function of the oesophagus in the alimentary canal?

    <p>To move food from the mouth to the stomach</p> Signup and view all the answers

    What is the consequence of poor dietary choices?

    <p>Obesity, malnutrition, and chronic diseases</p> Signup and view all the answers

    What are some sources of healthy fats?

    <p>Olive oil, canola oil, and sardines</p> Signup and view all the answers

    What percentage of the human body is composed of water?

    <p>50%</p> Signup and view all the answers

    Why is water an essential component of a healthy diet?

    <p>Because it helps in the elimination of waste products</p> Signup and view all the answers

    What is the importance of including foods from all seven essential groups in a healthy diet?

    <p>To ensure the body gets a balanced mix of all nutrients</p> Signup and view all the answers

    What are some plant-based sources of protein?

    <p>Soya beans, peas, beans, nuts, and seeds</p> Signup and view all the answers

    What is the primary energy source for the body?

    <p>Carbohydrates</p> Signup and view all the answers

    Why is it important to consume fats in moderation?

    <p>Because they can lead to health problems if consumed excessively</p> Signup and view all the answers

    What is the primary function of enzymes in digestion?

    <p>To break down nutrients into smaller molecules</p> Signup and view all the answers

    What is the role of the small intestine in the digestive system?

    <p>To break down proteins, fats, and carbohydrates with the aid of enzymes and bile</p> Signup and view all the answers

    What is the function of the rectum in the digestive system?

    <p>To store feces until they are expelled through the anus</p> Signup and view all the answers

    What is the result of the processes of peristalsis in the digestive system?

    <p>Food is propelled through the alimentary canal</p> Signup and view all the answers

    Which enzyme breaks down fats in the digestive system?

    <p>Lipase</p> Signup and view all the answers

    What is the primary function of the large intestine in the digestive system?

    <p>To absorb water and salts from indigestible food matter</p> Signup and view all the answers

    What is the process of nutrient absorption primarily occurring in?

    <p>Small intestine</p> Signup and view all the answers

    What is the role of villi and microvilli in the small intestine?

    <p>To increase the surface area for nutrient absorption</p> Signup and view all the answers

    What is the process of expelling undigested and unabsorbed food from the body?

    <p>Egestion</p> Signup and view all the answers

    Which enzyme breaks down proteins in the digestive system?

    <p>Protease</p> Signup and view all the answers

    What is the primary function of proteins in building and repairing body cells and tissues?

    <p>To facilitate chemical reactions in the body</p> Signup and view all the answers

    Why is it essential to include foods from all seven essential groups in a healthy diet?

    <p>To maintain proper body function and overall health</p> Signup and view all the answers

    What is the importance of vitamins in the body, besides being essential for various chemical reactions?

    <p>They strengthen the immune system and promote healthy eyesight</p> Signup and view all the answers

    Why is it crucial to moderate the intake of processed carbohydrates?

    <p>To prevent an excessive spike in blood sugar levels</p> Signup and view all the answers

    What is the primary role of fats and oils in the body, besides providing energy?

    <p>To protect and insulate organs</p> Signup and view all the answers

    What is the importance of fibre in a healthy diet, besides being a non-digestible carbohydrate?

    <p>It promotes digestive health and regular bowel movements</p> Signup and view all the answers

    What is the primary function of water in a healthy diet?

    <p>To maintain proper bodily functions and overall health</p> Signup and view all the answers

    Why is it essential to consume healthy fats in moderation?

    <p>To prevent an excessive accumulation of fat in the body</p> Signup and view all the answers

    What is the primary importance of including a variety of nutrients and substances in a healthy diet?

    <p>To maintain proper bodily functions and overall health</p> Signup and view all the answers

    What is the consequence of not including foods from all seven essential groups in a healthy diet?

    <p>Impaired bodily functions and overall health</p> Signup and view all the answers

    What is the primary function of vitamin C in the human body?

    <p>Keeping skin and gums healthy and boosting the immune system</p> Signup and view all the answers

    What is the main function of magnesium in the human body?

    <p>Important for strong bones, teeth, and muscles</p> Signup and view all the answers

    What is the primary function of the alimentary canal?

    <p>To facilitate the digestion and absorption of food</p> Signup and view all the answers

    What is the result of poor dietary choices?

    <p>Conditions such as obesity, malnutrition, and chronic diseases</p> Signup and view all the answers

    What type of digestion occurs in the mouth?

    <p>Both mechanical and chemical digestion</p> Signup and view all the answers

    What is the purpose of the starch test in food testing?

    <p>To identify the presence of starch</p> Signup and view all the answers

    What is the primary function of calcium in the human body?

    <p>Essential for strong bones and teeth</p> Signup and view all the answers

    What is the main function of the stomach in the alimentary canal?

    <p>To further the process of chemical digestion through gastric juices</p> Signup and view all the answers

    What is the approximate percentage of water in the human body?

    <p>More than 50%</p> Signup and view all the answers

    What is the primary function of sodium in the human body?

    <p>Regulates water in the blood and aids muscle and nerve function</p> Signup and view all the answers

    What is the primary function of the enzymes amylase, protease, and lipase in the digestive system?

    <p>To break down carbohydrates, proteins, and fats</p> Signup and view all the answers

    What is the primary location where the process of absorption occurs?

    <p>Small intestine</p> Signup and view all the answers

    What is the significance of peristalsis in the digestive system?

    <p>It ensures the progression of food through the alimentary canal</p> Signup and view all the answers

    What is the primary function of the large intestine?

    <p>To absorb water and salts from remaining indigestible food matter</p> Signup and view all the answers

    What is the significance of villi and microvilli in the small intestine?

    <p>They increase the surface area for absorption</p> Signup and view all the answers

    What is the result of the process of absorption in the small intestine?

    <p>Nutrients are transported to cells through the bloodstream</p> Signup and view all the answers

    What is the function of the rectum in the digestive system?

    <p>To store feces until defecation</p> Signup and view all the answers

    What is the primary function of enzymes in the digestive system?

    <p>To break down nutrients into smaller molecules</p> Signup and view all the answers

    What is the process of expelling undigested and unabsorbed food from the body?

    <p>Egestion</p> Signup and view all the answers

    Where do the enzymes amylase, protease, and lipase receive their target nutrients from?

    <p>Pancreas and liver</p> Signup and view all the answers

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