Unit 5 - Eating, Drinking & Breathing 2

Question 1

the main organs of the breathing system

Answer 1

lungs

Question 2

the muscular layer at the base of the chest cavity

Answer 2

diaphragm

Question 3

the average force on a certain area

Answer 3

pressure

Question 4

the maximum volume of air that can be exhaled

Answer 4

vital capacity

Question 5

a variable in an experiment that affects the outcome and is change

Answer 5

independent variable

Question 6

the variable that is measured in an investigation

Answer 6

dependent variable

Question 7

the factors kept constant in an investigation

Answer 7

control variables

Question 8

where gas exchange occurs in the lungs

Answer 8

alveoli

Question 9

the process of living things in which oxygen is used to release the energy in food

Answer 9

respiration

Question 10

small blood vessel

Answer 10

capillary

Question 11

small parts of a material such as an atom or molecule

Answer 11

particles

Question 12

the number of particles packed in a certain volume

Answer 12

concentration

Question 13

allows some but not all particles to pass through

Answer 13

semi-permeable membrane

Question 14

disease affecting the breathing system

Answer 14

asthma

Question 15

addictive substance in cigarettes

Answer 15

nicotine

Question 16

chemical in cigarettes that causes lung disease

Answer 16

tar

Question 17

tiny hair-like structures that help to keep mucus and dust out of the lungs

Answer 17

cilia