Overview
Recognise that some nutrients (micronutrients) are needed in small qualities while others (macronutrients) are needed in large quantities Show experimental that the break-down of carbohydrates may be partial (fermentation) or complete Recognise that cells require proteins, fats and carbohydrates for the production of new protoplasm, for repair, growth and provision of energy Recognise that certain cells are autotrophic and others are heterotrophic Discuss the role of enzymes in digestion Infer that excretion is the removal of metabolic waste products from the cell which may be toxic or which are in excess of the cell needs. removal of waste products is by diffusion through the body contractile vacuole. Identify growth as (i) increase in dry weight (ii) irreversible increase in size and length (iii) increase in number of cells Demonstrate by experiments factors that affect growth. Explain ability of cell to detect and respond to external stimuli. Identity structural adaptations for mobility e.g. Cilla and flagella. Recognise reproduction as the ability of living things to produce new individuals of their type
What you'll learn
- Feeding definition and types
- (i) Micronutrients
- (ii) Macronutrients
- Cellular Respiration
- (I) Definition of cellular respiration
- (ii) Aerobic respiration (catabolism); Krebs cycle
- (iii) Anaerobic respiration
- (iv) Energy released during respiration
- Anabolism - the usefulness of food
- Autotrophy
- (I) Photosynthesis
- (ii) Chemosynthesis
- Heterotrophy
- Role of enzymes
- Excretion
- Excretory organelles in living cells
- (i) waste products of metabolic activities of living cells
- (ii) forms in which waste products are excreted
- Growth:
- (i) basis of growth-cell division (mitosis) enlargement and differentiation
- (ii) regulation of growth by hormones
- Cell reactions to its environment
- (i) Irritability as basic characteristics of the protoplasm
- (ii) Types of responses
- Movement
- (i) Cyclosis
- (ii) Organelles for movement
- (iii) Growth movement as regulated by auxins
- Reproduction: Forms of reproduction
- (a) Asexual:
- (i) Fission.
- (ii) Building
- (iii) Vegetative propagation
- (b) Sexual:
- (i) Conjugation
- (ii) Fusion of male and female gametes, meiosis, structure and functions of the male and female gonads.