Section 2: Respiration

Question 1

Which cells does respiration occur in?

Answer 1

All cells

Question 2

How does cell respiration work?

Answer 2

Cells break down food molecules to release their stored energy

Question 3

What are waste products of aerobic respiration?

Answer 3

Carbon Dioxide & Water

Question 4

What is oxygen used for in cell respiration?

Answer 4

To oxidise food

Question 5

How do we maintain a steady body temperature?

Answer 5

From the heat released from aerobic respiration

Question 6

What is the word equation for aerobic respiration?

Answer 6

Glucose + Oxygen -> Carbon Dioxide + Water (+ Energy)

Question 7

What is the symbol equation for aerobic respiration?

Answer 7

C6H12O6 + 6O2 -> 6CO2 + 6H2O

Question 8

Where is the energy released in?

Answer 8

The mitochondria of cells

Question 9

Which of the two respirations requires oxygen?

Answer 9

Aerobic Respiration

Question 10

Which of the two respirations doesn’t require oxygen?

Answer 10

Anaerobic Respiration

Question 11

Which of the two respirations produce less energy and why?

Answer 11

Anaerobic Respiration does, because there is not as much glucose to break down

Question 12

Why is anaerobic respiration good?

Answer 12

As it lets cells that don’t have enough oxygen to respire

Question 13

What does broken down glucose get converted in when anaerobically respired in yeast?

Answer 13

It is converted to ethanol and carbon dioxide

Question 14

What is the word equation for anaerobic respiration in plants and yeast?

Answer 14

Glucose -> Ethanol + Carbon Dioxide (+ Energy)

Question 15

What is the symbol equation for anaerobic respiration in plants and yeast?

Answer 15

C6H12O6 -> 2C2H5OH + 2CO2

Question 16

Why does ethanol produce a lot of heat?

Answer 16

As they have a lot of stored energy; therefore, they are a good fuel

Question 17

When do muscles switch from aerobic respiration to anaerobic respiration?

Answer 17

When the muscles aren’t getting enough oxygen because they are being too worked that the blood can’t deliver oxygen quickly enough

Question 18

What is the word equation for anaerobic respiration in muscles?

Answer 18

Glucose -> Lactic Acid (+ Energy)

Question 19

What is the symbol equation for anaerobic respiration in muscles?

Answer 19

C6H12O6 -> 2C3H6O3

Question 20

What does anaerobic respiration allow overworked muscles to do?

Answer 20

Carry on working for a short period of time

Question 21

What does the worker have to do once he they have used anaerobic respiration for a long period of time to supply oxygen to their overworked muscle?

Answer 21

They have to oxidise the lactic acid in their blood stream.

Question 22

What is an oxygen debt?

Answer 22

The volume of oxygen required to oxidise the lactic acid in a person’s blood stream

Question 23

What do cells take in and give out in aerobic respiration?

Answer 23

Take in glucose and oxygen and give out carbon dioxide and water

Question 24

What part of the cell is in charge of allowing certain things to go in and out of the cell?

Answer 24

The cell membrane

Question 25

How does the cell membrane get certain things to go in and to out of the cell?

Answer 25

By diffusion, osmosis and active transport

Question 26

When does diffusion occur?

Answer 26

When one substance is more concentrated in an area than another

Question 27

What is concentration gradient?

Answer 27

The difference in concentration within two places

Question 28

How does carbon dioxide diffuse out of the cell over time?

Answer 28

Carbon dioxide molecules can freely move in and out of the cell. As over time there will be more carbon dioxide outside of the cell, all of the carbon dioxide will diffuse out.

Question 29

What is net movement?

Answer 29

The movement of molecules / particles from in a cell to out of the cell or vice versa

Question 30

How does oxygen diffuse out of the cell over time?

Answer 30

Respiration uses up oxygen and there would be more oxygen in the blood. This means that oxygen would diffuse into the cell.