Gas exchange

Question 1

Where is energy produced in a cell

Answer 1

Mitochondria

Question 2

How does mitochondria make energy

Answer 2

Energy is produced through respiration
Glucose is used to release energy

Question 3

What does respiration do

Answer 3

Transfers food into energy

Question 4

What gas do you breathe out

Answer 4

Carbon dioxide

Question 5

What gas do you breathe in

Answer 5

Oxygen

Question 6

Where does glucose come from

Answer 6

Digested carbohydrates

Question 7

Respiration word equation

Answer 7

Glucose + oxygen -> carbon dioxide + water (+ energy)

Question 8

When energy is released it is called

Answer 8

Aerobic respiration

Question 9

What is respiration similar to

Answer 9

Combustion- burning fuels

Question 10

What reacts in combustion

Answer 10

Fuel and oxygen

Question 11

Combustion word equation

Answer 11

Fuel + oxygen -> carbon dioxide + water

Question 12

What is released in combustion

Answer 12

Heat and light energy and carbon dioxide and water

Question 13

Trachea

Answer 13

Transports air into bronchi from mouth and nose - hard as it is made of rings of cartilage

Question 14

Bronchus

Answer 14

Transports air from the trachea to the alveoli they are smaller versions of the trachea

Question 15

Bronchioles

Answer 15

Lots of smaller branches off the bronchus connecting to the alveoli

Question 16

Alveoli

Answer 16

Tiny air sacks where gas exchange occurs they fill with air when we breathe in

Question 17

Diaphragm

Answer 17

Contracts to move the rib cage it’s found beneath the lungs

Question 18

Mouth

Answer 18

Where you inhale through

Question 19

First part of gas exchange

Answer 19

Oxygen O2 is picked up by red blood cells this is called oxygenated blood when you inhale

Question 20

2nd part of gas exchange

Answer 20

Oxygenated blood pumped around the body to the cells in our tissues

Question 21

3rd part of gas exchange

Answer 21

Cells in the tissue use the O2 in the blood and is now deoxygenated blood

Question 22

4th part of gas exchange

Answer 22

Cells of the tissue produce waste carbon dioxide- CO2

Question 23

5th part of gas exchange

Answer 23

The carbon dioxide is removed from the blood in the lungs when you breathe out and the cycle restarts

Question 24

How are alveoli adapted to make gas exchange more efficient

Answer 24

Thin moist walls - one cell thick
Give the lung a large surface area
Lots of tiny blood vessels called carpillaries

Question 25

Intercostal muscles when you inhale

Answer 25

Contract

Question 26

Intercostal muscles when you exhale

Answer 26

Relax

Question 27

Ribs when you inhale

Answer 27

Up and out

Question 28

Ribs when you exhale

Answer 28

In and out

Question 29

Diaphragm muscles when you inhale

Answer 29

Lowers

Question 30

Diaphragm muscles when you exhale

Answer 30

Raised

Question 31

Volume of chest when you inhale

Answer 31

Increase- pressure in chest decreases

Question 32

Volume of chest when you exhale

Answer 32

Decreases - pressure in chest get’s higher

Question 33

Epiglottis

Answer 33

Stops food from entering the windpipe

Question 34

Intercostal muscles

Answer 34

Contracts to move the rib cage they are found between the ribs

Question 35

Exercise word equation

Answer 35

Glucose + oxygen-> carbon dioxide + water + energy

Question 36

What is anaerobic respiration

Answer 36

A build up of lactic acid which causes pain in muscles

Question 37

What is lactic acid broken down into

Answer 37

Carbon dioxide and water but without oxygen lactic acid is able to build up

Question 38

Is less energy released in aerobic or anaerobic respiration

Answer 38

Less energy is released in anaerobic respiration so aerobic cannot be sustained for as long

Question 39

Can aerobic respiration be sustained for long

Answer 39

It cannot as it releases more energy more quickly - does not produce lactic acid

Question 40

Can anaerobic respiration be sustained for long

Answer 40

It can be sustained it releases less energy at once and dies produce lactic acid

Question 41

What is fermentation

Answer 41

A type of anaerobic respiration- yeast respires without needing oxygen

Question 42

Word equation for fermentation

Answer 42

Glucose-> ethanol + carbon dioxide (+ energy)

Question 43

How do plants make their own food

Answer 43

Photosynthesis

Question 44

What part of the plant photosynthesises

Answer 44

The leaves

Question 45

How are leaves adapted for photosynthesis

Answer 45

Large surface area to absorb more light

Question 46

What is the waxy layer in the leaf for

Answer 46

To stop water bearing lost from the leaf

Question 47

What is the stomata on the leaf

Answer 47

The holes in the leaf to allow carbon dioxide in and oxygen out