B1 1.3 Inheritance , Exercise And Health

Question 1

Why do we need cholesterol

Answer 1

We need cholesterol for our cell membranes and to make vital hormones. There are two forms of cholesterol one is healthy but the other can cause health problems.

If the balance of cholesterol levels is wrongs he risk of heart disease increases.

Question 2

What organ balances cholesterol

Answer 2

The liver.

Question 3

How can inherited factors raise cholesterol

Answer 3

One in every five hundred people inherit factors which mean they have high levels of harmful cholesterol and an increased risk of heart disease whatever they eat

Example of how inherited factors can affect health

Question 4

Explain how exercise affects your health.

Answer 4

You are less likely to become overweight if you exercise regularly. This is partly because you are using up more energy and have a increased metabolic rate.

You will have more muscle tissue, which will increase metabolic rate, if you can control your weight you will be less likely to be affected by arthritis, diabetes, high blood pressure.

Cholesterol levels are affected by exercise, regular exercise lowers blood cholesterol levels. It also helps the balance of different types of cholesterol.

Exercise increases healthy cholesterol and decreases harmful cholesterol. This lowers risk of heart disease and other health problems.

Question 5

Inheriting health

Answer 5

Inherited factors affect your metabolic rate which affects how easily you lose or gain mass. Being overweight has a bad affect on your health

Inherited factors affect the proportion of muscle to fat in the body
They also affect risk of heart disease , partly because they influence the levels of blood cholesterol levels