B1 1 Diet and Exercise Flashcards Preview

AQA GCSE Science > B1 1 Diet and Exercise > Flashcards

Flashcards in B1 1 Diet and Exercise Deck (15):

What is the metabolic rate?

The chemical reactions that take place in cells.


What does a balanced diet consist of?

• Carbohydrates
• Proteins
• Fats
• Vitamins
• Minerals
• Fibre
• Water


What does malnourishment mean?

If you're malnourished, you don't have a balanced diet.


What is the cause of deficiency diseases?

A lack of vitamin and mineral ions.


Why do most athletes need a lot of energy?

They have a great deal of muscle tissue (muscle to fat ratio) so they need a lot of food to supply the energy that they need.


What affects the amount of energy that you need?

• Exercise
• Metabolic rate
• Gender
• Age
• Temperature
• Inherited factors


What's the missing word?

In warmer countries, you need to eat ... food. This is because you use less energy keeping your body temperature at a steady level.



What happens when you take in more energy than you use?

The excess is stored as fat.


What can fat act as?

• Protection for your internal organs
• Energy store
• Insulation


Carrying too much weight is inconvenient. Being obese or overweight can lead to many problems.
Name a few:

• Type 2 diabetes
• High blood pressure
• Heart disease


How can you reduce your weight?

• Cutting back the amount of food you eat. Especially the energy rich foods like biscuits

• Increase the amount of exercise you do



The word malnourished can be used to describe people who do not have a balanced diet. They may have too little or too much food, or have a wrong combination of foods.


What is cholesterol needed for?

• Cell membranes
• To make vital hormones


What do inherited factors affect?

• The proportion of muscle to fat in your body

• The risk of heart disease as they influence the amount of cholesterol in your blood


Why does exercise keep you healthy?

• You're less likely to be overweight as you will be using more energy

• You'll have more muscle tissue which will increase your metabolic rate

• Exercise helps keep the balance between the different types of cholesterol. The levels of good cholesterol goes up whereas the harmful cholesterol levels go down