B2.4 Energy From Respiration Flashcards Preview

GCSE AQA Biology (old spec) > B2.4 Energy From Respiration > Flashcards

Flashcards in B2.4 Energy From Respiration Deck (23):
1

What is the word equation for aerobic respiration?

Oxygen + glucose --energy--> carbon dioxide + water +(energy)

2

Define respiration

A chemical reaction that happens in all living things which releases energy in the presence of oxygen

3

What's the difference between breathing and respiration?

Breathing is a muscular contraction whereas respiration is the chemical reaction

4

Where does respiration occur?

Mitochondria

5

How are mitochondria adapted for respiration?

Rod-shaped
Folded inner membrane provides and large surface area
They have a matrix

6

Why do we need respiration?

Digestion - muscle contraction in stomach
Growing
Building up new cell material
Muscles contract when you breathe keeping your heart beating
To keep your body at a constant temperature - energy is used to sweat

7

What is the respiration energy used for?

Constant temperature
Growth
Movement
Digestion

8

How do you test for CO2

Limewater turns cloudy

9

How do you test for water

Cobalt chloride paper goes from blue to pink

10

Define heart rate
Define breathing rate

The number of heartbeats per minute
The number of breaths per minute

11

Why does your heart rate increase during exercise?

It needs to get your blood around your body quicker and get oxygen to your muscles and remove CO2

12

Why does your breathing rate increase during exercise?

Your body needs more oxygen in your body and muscles and you need to exhale more carbon dioxide

13

What's glycogen?

It's where your muscles store glucose. It converts into glucose when you exercise which is used for aerobic respiration
Found in the liver also

14

What are the benefits of exercise?

Your heart and lungs become larger and stronger
You get a more efficient blood supply
Stress-relief
It releases happy hormones
Weight loss

15

Why do you get hungry after exercising?

You use up energy when you exercise and need the energy in food to restore your body

16

What's glucose?

Soluble
Found in water and blood
Stored as glycogen in muscles and liver

17

-----stored as------>
_________ ___________

-----stored as------>
Glucose Glycogen

18

What does anaerobic actually mean?

Without oxygen

19

What's the word equation for anaerobic respiration?

Glucose -> lactic acid + little energy

20

What's similar about aerobic and anaerobic respiration?

Both produce energy
Both involve glucose

21

What's the difference between aerobic and anaerobic respiration?

Anaerobic doesn't use oxygen and lactic acid is produced
More energy is produced aerobically

22

Where does anaerobic respiration occur?

Cytoplasm

23

When is anaerobic respiration used?

During first two mins of exercise
Lactic acid causes muscle pain hence why you stretch before you do exercise