Biology Unit 1
- Created by: slr674
- Created on: 18-09-14 17:00
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- Biology Unit 1
- A Healthy Diet
- Food contains:
- Carbohydrates
- Used to: 1. release energy 2.provide nutrients to build cells
- Fats
- Proteins
- Used to: 1. release energy 2.provide nutrients to build cells
- Fats
- Proteins
- Mineral ions
- Needed in small amounts, so cells can work properly
- Vitamins
- Needed in small amounts, so cells can work properly
- Vitamins
- Carbohydrates
- Food contains:
- Controlling Mass
- Metabolic Rate
- = Rate at which all chemical reactions are carried out in the body
- Affected by: 1. How much muscle you have 2. How much exercise you do 3. INHERITED FACTORS
- Body gains ENERGY by eating food
- Energy is EXPENDED during exercise
- EXPENDED = used
- Balance between energy taken in and energy expended affects your mass.
- Energy is EXPENDED during exercise
- Metabolic Rate
- Lifestyle and Disease
- Lifestyle = way we live, so what we eat and do
- This affects how active we are
- Lifestyle factors can harm health and lead to disease
- A person who exercises regularly is more likely to stay healthy than a person who doesn't
- Inherited Factors
- some people have genes that give them a higher blood cholesterol level than other people that eat the same diet
- Lifestyle = way we live, so what we eat and do
- Pathogens and Infection
- Microorganisms that cause disease are called pathogens
- BACTERIA
- Release TOXINS = makes us feel ill
- some types invade and destroy body cells
- VIRUSES
- take over body cell's DNA, causing cell to make toxins or causing damage when new viruses are
- A Healthy Diet
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