Unit 1

Question 1

mitochondria

Answer 1

release energy from food

Question 2

chloroplast

Answer 2

this is where plants make their food

Question 3

cell wall

Answer 3

holds the plant cell in shape

Question 4

cell membrane

Answer 4

controls what oges in and out

Question 5

sap vacuole

Answer 5

liquid inside it is a solution of sugar and other substances dissolved in water

Question 6

cytoplasm

Answer 6

chemical reaction happens inside the cytoplasm

Question 7

red blood cell

Answer 7

-small than other cells in the body to allow them to get through tiny blood capillaries- so can deliver oxygen to every part of the body
- the cytoplasm contains a red pigment called haemoglobin
- the cell has no nucleus to leave more space for haemoglobin

Question 8

neurone

Answer 8

carry electrical signals from one part of the body to another

Question 9

axon

Answer 9

very long strand of cytolpasm. electrical signals can travel along this very quickly

Question 10

dendrites

Answer 10

short strand of cytoplasm that collect electrical signal signals from other haemoglobin cells.

Question 11

ciliated cell

Answer 11

-have tiny threads along one edge, called cillia and can move.
- other cells lining make a sticky substance called cilia

Question 11

root hair cell

Answer 11

-found ont he outside of the cell
-to absorb water from soil
-long, thin extension that allows water to move easily from the soi into the cell

Question 12

paliside cell

Answer 12

-found in leaves of plants
-to make food photosynthesis
- have a lot of chloroplast contianing chlorophyll
-chlorophyll absorbs energy from sunlight used to help the plant make food

Question 13

cell

Answer 13

smallest unit of living organism

Question 14

tissue

Answer 14

a group of cells of the same type

Question 15

organ

Answer 15

a group of different tissues working together to carry out a job.