Year 8 Biology

Question 1

What makes a healthy diet?

Answer 1

A healthy diet is the nutrients and energy needed especially for you.

Question 2

Protein

Answer 2

Allow growth and tissue repairs

Question 3

Carbohydrates

Answer 3

Give us energy and fibre helps the intestines contract to move waste along and extract the nutrients in food.

Question 4

Fats

Answer 4

Provides energy and insulation

Question 5

Vitamin C

Answer 5

Needed for healthy for skin and gums

Question 6

Vitamin D

Answer 6

Helps absorb calcium

Question 7

Iron (mineral)

Answer 7

Helps produce blood cells

Question 8

Calcium (mineral)

Answer 8

Used for strong teeth and bones

Question 9

Balanced diet

Answer 9

A balanced diet depends on your age, your sex, the amount of exercise you do and your mass.

Question 10

Testing food for nutrients

Answer 10

Testing food for nutrients is important as we need to know what nutrients we are taking in so we know what we need more and less of.

Question 11

Positive and negative food results

Answer 11

A positive food result is when the nutrients you are testing for is present, a negative food result is when the nutrient you are testing for is not present

Question 12

Dietary problems

Answer 12

Dietary problems is mainly caused by not getting enough of a type(s) of nutrients. If you don’t get enough calcium for instance you could get osteoporosis.

Question 13

Why does food need to be digested?

Answer 13

Food needs to be digested so we don’t get constipation, so we can respire and so we get the nutrients we are getting

Question 14

Enzymes

Answer 14

They are biological catalysts which speed up the rate of digestion.

Question 15

Bacteria

Answer 15

While most bacteria are bad for you some can be good. For instance some bacteria can fight infections.

Question 16

Medicinal and recreational drugs

Answer 16

People generally takes drugs because it will help them get better or give them a boost in nutrients. A recreational drug alters the state of mind. It makes most people feel “high” once they have taken the drug. In serious cases though you can get severe mental illnesses or die.

Question 17

Recreational negative effects.

Answer 17

People are addicted to them and become quite aggressive without them. Costs them lots of money. Don’t know what is in these drugs. Can give you mental illnesses or death.

Question 18

Alcohol

Answer 18

People often drink alcohol slows the reaction time of the brain which is why you can’t drink-drive. People fell really good about themselves or they take alcohol to get rid of there problems. Even though the next day the problem is still there and they have a hangover (bad headache)

Question 19

Importance of drinking information

Answer 19

It is important to give information about drinking to the public to make them more aware of all the negative side affects it has. This is especially important for pregnant ladies as they could have a miscarriage or a disabled baby which could cause the family a lot of inconvenience even if they do still love the child.

Question 20

Smoking

Answer 20

Smoking can cause diseases as it has a lot of dangerous chemicals in them. Be it the addictive substance nicotine or tar which is a carcinogen. Carbon monoxide is also in cigarettes which binds to red blood cells and reduces the amount of oxygen they can carry.

Question 21

Smoking affects the fetus

Answer 21

The smoking doesn’t just affect the person smoking it. If they are carrying a baby in the uterus the bad substances can pass to the baby through the placenta.

Question 22

What is the addictive substance in alcohol?

Answer 22

Ethanol is the addictive substance in alcohol which is what alcoholics crave.