Science-y9

Question 1

Tissue

Answer 1

Groups of similar cells that work together to perform a specific function. For example, brain tissue, muscle tissue and heart tissue.

Question 2

Cells

Answer 2

The basic building blocks of all living things.

Question 3

Organ

Answer 3

A group of different tissues that work together to do a particular job.

Question 4

Organ system

Answer 4

A group of organs working together

Question 5

Enzyme

Answer 5

A molecule that speeds up chemical reactions. Help to digest our food

Question 6

Alveoli

Answer 6

Structure in the lungs where gas exchange takes place

Question 7

Reflex

Answer 7

Fast automatic responses of the nervous system that do not involve conscious thought.

Question 8

Artery

Answer 8

Blood vessel with thick muscular walls that carry oxygenated blood (except pulmonary artery) away from the heart under high pressure.

Question 9

Vein

Answer 9

Blood vessel with thin walls that carry deoxygenated blood (except pulmonary vein) back to the heart under low pressure. They have valves to prevent backflow.

Question 10

Capillary

Answer 10

Blood vessel with thin walls that allows exchange of molecules like glucose, oxygen and carbon dioxide.

Question 11

Stomach

Answer 11

Muscular organ where food is mixed with hydrochloric acid and churned

Question 12

Pancreas

Answer 12

Produces digestive enzymes

Question 13

Gall bladder

Answer 13

Stores bile

Question 14

Small intestine

Answer 14

Where food is mixed with digestive enzymes and bile. Food is absorbed into the blood

Question 15

Large intestine

Answer 15

Where water is reabsorbed

Question 16

Active Transport

Answer 16

The movement of particles from an area of low concentration to an area of high concentration, against the concentration gradient.

Question 17

Diffusion

Answer 17

The movement of particles from an area of high concentration to an area of low concentration, down the concentration gradient.

Question 18

Stem cell

Answer 18

A cell which has not yet become specialised and is undifferentiated.

Question 19

Specialised cell

Answer 19

These cells have special features that allow them to perform their functions effectively.

Question 20

Vacuole

Answer 20

A space within the cytoplasm of plant cells that contains sap.

Question 21

Cell wall

Answer 21

Outer structure made of cellulose that surrounds the cell and gives it support.

Question 22

Eukaryote

Answer 22

Cells that have a nucleus, including plant and animal cells

Question 23

Prokaryote

Answer 23

Cells that do not have a nucleus, e.g. bacteria. Some prokaryotes also have plasmids and flagella.

Question 24

Reactivity series

Answer 24

A list of metals from most reactant to least reactant.