Nutrition
Übersicht
Nutrition is the foundation of biology: plants build glucose from sunlight through photosynthesis, and animals break complex food molecules into absorbable nutrients through digestion. Both processes keep cells supplied with the energy and raw materials they need to survive.
In this lesson you will explore photosynthesis (its equation, limiting factors and leaf adaptations), balanced diets, the human digestive system, and how the small intestine is built for efficient absorption. These topics appear across both Biology papers in the Double Award exam.
Ziele
- Understand the process of photosynthesis and its importance in the conversion of light energy to chemical energy
- Know the word equation and the balanced chemical symbol equation for photosynthesis
- Understand how varying carbon dioxide concentration, light intensity and temperature affect the rate of photosynthesis
- Describe the structure of the leaf and explain how it is adapted for photosynthesis
- Understand that plants require mineral ions for growth, and that magnesium ions are needed for chlorophyll and nitrate ions are needed for amino acids
- Investigate photosynthesis, showing the evolution of oxygen from a water plant, the production of starch and the requirements of light, carbon dioxide and chlorophyll
- Understand that a balanced diet should include appropriate proportions of carbohydrate, protein, lipid, vitamins, minerals, water and dietary fibre
- Identify the sources and describe the functions of carbohydrate, protein, lipid, vitamins A, C and D, the mineral ions calcium and iron, water and dietary fibre as components of the diet
- Understand how energy requirements vary with activity levels, age and pregnancy
- Describe the structure and function of the human alimentary canal
- Understand how food is moved through the gut by peristalsis
- Understand the role of digestive enzymes, including the digestion of starch to glucose by amylase and maltase, the digestion of proteins to amino acids by proteases and the digestion of lipids to fatty acids and glycerol by lipases
- Understand that bile is produced by the liver and stored in the gall bladder
- Understand the role of bile in neutralising stomach acid and emulsifying lipids
- Understand how the small intestine is adapted for absorption, including the structure of a villus
Lektionshinweis
Verfügbar in der Green Bridge App
Laden Sie die Green Bridge CBT App auf Ihr Telefon oder Ihren Computer herunter, um auf vollständige Lernnotizen, Übungsfragen und mehr zuzugreifen.
Unterrichtsbewertung
Herzlichen Glückwunsch zum Abschluss der Lektion über Nutrition. Jetzt, da Sie die wichtigsten Konzepte und Ideen erkundet haben,
Sie werden auf eine Mischung verschiedener Fragetypen stoßen, darunter Multiple-Choice-Fragen, Kurzantwortfragen und Aufsatzfragen. Jede Frage ist sorgfältig ausgearbeitet, um verschiedene Aspekte Ihres Wissens und Ihrer kritischen Denkfähigkeiten zu bewerten.
Nutzen Sie diesen Bewertungsteil als Gelegenheit, Ihr Verständnis des Themas zu festigen und Bereiche zu identifizieren, in denen Sie möglicherweise zusätzlichen Lernbedarf haben.
- Which pigment absorbs light energy for photosynthesis? A) Carotene B) Chlorophyll C) Haemoglobin D) Melanin Answer: B
- What is the role of bile in digestion? A) It chemically digests protein B) It emulsifies lipids and neutralises stomach acid C) It absorbs glucose in the small intestine D) It produces amylase Answer: B
- Which mineral ion is needed for making chlorophyll? A) Iron B) Calcium C) Nitrate D) Magnesium Answer: D
- Where does most chemical digestion and absorption of food take place? A) Stomach B) Large intestine C) Small intestine D) Mouth Answer: C
- Which of the following is NOT a limiting factor for photosynthesis? A) Temperature B) Oxygen concentration C) Light intensity D) Carbon dioxide concentration Answer: B
Verfügbar in der Green Bridge App
Laden Sie die Green Bridge CBT App auf Ihr Telefon oder Ihren Computer herunter, um auf vollständige Lernnotizen, Übungsfragen und mehr zuzugreifen.
Verfügbar in der Green Bridge App
Laden Sie die Green Bridge CBT App auf Ihr Telefon oder Ihren Computer herunter, um auf vollständige Lernnotizen, Übungsfragen und mehr zuzugreifen.
Übungsklausuren üben
Möchten Sie Übungsklausuren zu Nutrition üben? Laden Sie die Green Bridge CBT App herunter, um Übungsklausuren und vollständige Prüfungssimulationen zu diesem Thema zu erhalten.
Lade die App im Google Playstore herunter.
Alles, was du brauchst, um in JAMB, WAEC & NECO zu glänzen.
