Health And Lifestyle

Question 1

What is a nutrient?

Answer 1

It is an important substance that your body needs to survive and stay healthy.

Question 2

What is the funtion of carbohydrates and what food provides them?

Answer 2

Main source of energy.
Sugary foods - sugar and fruit
Starchy foods - pasta and bread.

Question 3

What is the function of lipids and where are they from?

Answer 3

Fats and oils that provide energy.
Keep you warm
Protect organs.

Question 4

What job do proteins do and what food are they in?

Answer 4

Used for growth and repair.

Meat, fish, eggs.

Question 5

What about water?

Answer 5

70% of cells made of water.

Needed in all cells and bodily fluids.

Question 6

What is the function of minerals and vitamins?

Answer 6

Essential in small amounts to keep you healthy.
Vit A - good eyesight
Vit D and calcium - healthy teeth and bones.

Question 7

What is the function of fibre and where do I find that?

Answer 7

Provides bulk to keep food moving through the gut - not a nutrient

Question 8

What does a balanced diet depend on?

Answer 8

Your age, gender, activity level

Question 9

How can an unhealthy diet cause health issues?

Answer 9

Eaten wrong amount or types of food.
Underweight
Overweight
Vitamin and mineral deficiencies

Question 10

What is the food test for starch?

Answer 10

Iodine

If it turns dark blue-black startch present

Question 11

What is the food test for lipids?

Answer 11

Filter paper
If paper is translucent, food contains lipids.
Food solution use ethanol - turns cloudy food contains lipids.

Question 12

What is the food test for sugar?

Answer 12

Benedict’s solution

If it turns orange-red, food contains sugar.

Question 13

What is the food test for protein?

Answer 13

Copper sulfate and sodium hydroxide.

If solution turns purple, protein is present.

Question 14

Why does food have to be digested?

Answer 14

During digestion, molecules broken down so the nutrients can pass into the blood where they are used by the body.

Question 15

How is the small intestine adapted to provide a large surface area for maximum nutrient absorption?

Answer 15

Wall of small intestine is covered by tiny structures called villi.They stick out of the wall and give it a big surface area.

Question 16

Name parts of the digestive system and their functions in order

Answer 16

Mouth - food chewed mixed with saliva.
Gullet - food passes down this tube.
Stomach - food mixed with digestives and acids.
Small intestine - digestive juices are added. Small molecules of nutrients pass through the intestine wall into the bloodstream.
Large intestine - food that cannot be digested. Solid waste - feces left.
Rectum - feces stored here.
Anus - muscular ring which feces passes out of the body.

Question 17

What are enzymes?

Answer 17

Special proteins that break down large molecules into small molecules.
Biological catalysts which speed up digestion.

Question 18

What are the three main types of enzyme involved in digestion?

Answer 18

Carbohydrates are broken down by carbohydrase into sugar.
Protein is broken down by protease into amino acids.
Lipids are broken down by lipase intonfatty acids and glycerol.

Question 19

How do drugs and alcohol affect people’s health?

Answer 19

Medicinal ( benefit your health) and recreational drugs ( many cases harmful).
Alcohol is a depressant because it slows down your body’s reactions.
Smoking tar, nicotine, carbon monoxide
Addiction is when your body becomes used to the changes caused by a drug and you need the drug to feel normal.