Gcse

Question 1

Diffusion

Answer 1

Net movement of particles from areas of high concentration moving to low areas of concentration

This is a passive process and requires no energy

Question 2

Concentration gradient

Answer 2

Difference in concentration between 2 areas

Steeper gradient-quicker rate of diffusion

Question 3

Osmosis

Answer 3

Water going towards areas with low areas of sugar

This is a passive process and requires no energy

Question 4

Hypertonic

Answer 4

Strong

When sugar is high in the balloon and the water leaves leaving a shrivelled balloon of sugar

Question 5

Hypotonic

Answer 5

Weak

When h2o is attracted towards the sugar and ends up bursting as too much water is going in and none is going out

Question 6

Isotonic

Answer 6

Same

When water is going in and out the balloon because the sugar is at an even balance all around it

Question 7

How could osmosis kill someone?

Answer 7

When someone drinks too much water the balance is uneven and too much water is going into alot of cells bursting them in the process.

Question 8

Turgid cell

Answer 8

A full vacuole which pushes against the wall, supporting the stem

Question 9

Flaccid cell

Answer 9

A half full vacuole which takes up less space and makes the stem floppy

Question 10

Active transport

Answer 10

When particles move up a concentration gradient

Question 11

What colour does food solution become in starch

Answer 11

Black(iodine)

Question 12

What colour does a food solution become in lipids

Answer 12

cloudy(ethanol)

Question 13

What colour does food become if there is sugar in it

Answer 13

Blue-green-orange-red going up as there is more sugar(benedicts solution)

Question 14

What colour does food become if there is protien

Answer 14

Purple(buriets solution)

Question 15

What is the order of the digestive system

Answer 15

Mouth-oesophagus-stomach-small intestine-large intestine-anus

Question 16

What are the 7 nutrient groups

Answer 16

Carbohydrates-protiens-fats and oils-minerals-vitamins-fibre-water

Question 17

What do carbohydrates do

Answer 17

Give you a source of energy

Found in breads, cereal, rice etc

Question 18

What do protiens do

Answer 18

Makes new cells and is needed for growth and repair

Found in eggs, meat, nuts, dairy etc

Question 19

What do lipids do

Answer 19

An extra energy reserve and provides insulation

Found in butter, cakes, red meat, cheese, crisps etc

Question 20

What are the 4 systems in a body

Answer 20

Circulatory system, digestive system, nervous system, repoductive system

Question 21

Sort tissue, organ, organism, organ systems, cells in order

Answer 21

Cells, organ, organ system, organisms

Question 22

What happens in the mouth in the digestive system

Answer 22

Food is chewed, saliva is added

Question 23

What happens in the oesophagus

Answer 23

Food gets tranferred from the mouth to the stomach

Question 24

What happens in the stomach

Answer 24

The stomach churns the food and hydrochloric acid is added

Question 25

What happens in the small intestine

Answer 25

Digested food is absorbed into the blood stream

Question 26

What happens in the large intestines

Answer 26

Digested food is absorbs into the blood stream

Question 27

What happens in the large intestine

Answer 27

Remaining food is put through to the large intestine and water is absorbed

Question 28

What happens at the anus

Answer 28

Any undigested food exits