Nutrition
Akopọ
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.
Awọn Afojusun
- 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
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Ṣe ìdánrawò káàdì wọ̀nyí nínú áàpù
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Ìdánwò Ẹ̀kọ́
Oriire fun ipari ẹkọ lori Nutrition. Ni bayi ti o ti ṣawari naa awọn imọran bọtini ati awọn imọran, o to akoko lati fi imọ rẹ si idanwo. Ẹka yii nfunni ni ọpọlọpọ awọn adaṣe awọn ibeere ti a ṣe lati fun oye rẹ lokun ati ṣe iranlọwọ fun ọ lati ṣe iwọn oye ohun elo naa.
Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.
Lo ise abala yii gege bi anfaani lati mu oye re lori koko-ọrọ naa lagbara ati lati ṣe idanimọ eyikeyi agbegbe ti o le nilo afikun ikẹkọ. Maṣe jẹ ki awọn italaya eyikeyi ti o ba pade da ọ lójú; dipo, wo wọn gẹgẹ bi awọn anfaani fun idagbasoke ati ilọsiwaju.
- 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
Ṣiṣẹ́ lórí àwọn ìbéèrè wọ̀nyí nínú ohun èlò náà
Ṣiṣẹ́ lórí àwọn ìbéèrè wọ̀nyí nínú ohun èlò náà
Awọn Iwe Itọsọna Ti a Gba Nimọran
Ẹ̀kọ́ síwájú láti àwọn orísun ṣíṣí
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Abala ìwé ẹ̀kọ́
Nutrition and Energy Production
Explain why an animal’s diet should be balanced and meet the needs of the body
"Biology: Nutrition and Energy Production" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/biology/pages/34-2-nutrition-and-energy-production. Access for free at https://openstax.org/books/biology/pages/1-introduction
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Abala ìwé ẹ̀kọ́
Digestive Systems
Explain the processes of digestion and absorption
"Biology: Digestive Systems" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/biology/pages/34-1-digestive-systems. Access for free at https://openstax.org/books/biology/pages/1-introduction
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Ṣe Adaṣe Awọn Ibeere Idanwo Adaṣe
Ṣe o fẹ ṣe adaṣe awọn ibeere idanwo adaṣe nipa Nutrition? Ṣe igbasilẹ ohun elo Green Bridge CBT lati wọle si awọn ibeere idanwo adaṣe ati awọn ayẹwo adaṣe kikun fun koko-ọrọ yii.
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