Respiration

Question 1

What is respiration?

Answer 1

Respiration is the process by which energy is released from glucose, stored in food.

Question 2

What is aerobic respiration?

Answer 2

Where energy is released from glucose, with oxygen.

Question 3

What is anaerobic respiration?

Answer 3

Where energy is released from glucose, without oxygen.

Question 4

Where does aerobic respiration take place?

Answer 4

Inside cells, in organelles called mitochondria

Question 5

Energy can’t be…. only….. and……

Answer 5

Energy can’t be created only moved and transformed

Question 6

What is the symbol equation for anaerobic respiration?

Answer 6

C”6H”12O”6 +6O”2—–> 6CO”2 + 6H”2O

Question 7

How many oxygen molecules are needed per molecule of glucose?

Answer 7

6 oxygen molecules are needed per glucose ( also produces 6CO2 molecules and 6 H2O molecules)

Question 8

What happens (respiration) when we exercise?

Answer 8

Muscles require more energy for extra contractions, so aerobic respiration increases and the cell starts to lose its store of oxygen and glucose.

Question 9

Why does the heart beat faster when we exercise?

Answer 9

So that more oxygenated blood reaches our cells, this blood also brings increased supplies of glucose and takes away the carbon dioxide and excess water.

Question 10

Why does your breathing rate increase when you exercise?

Answer 10

As the more you breathe in and out, the more oxygen there is for the cells and the greater the removal rate of the waste products for respiration.

Question 11

What happens if the exercise is so demanding that there isn’t enough oxygen?

Answer 11

Anaerobic respiration occurs as the cell cannot get enough oxygen quickly enough from aerobic respiration.

Question 12

What does anaerobic respiration use as its source of energy?

Answer 12

Glucose, the same as aerobic.

Question 13

Which form of respiration is more inefficient?

Answer 13

Anaerobic respiration is more inefficient than aerobic respiration.

Question 14

Which form of respiration is more inefficient?

Answer 14

Anaerobic respiration is more inefficient than aerobic respiration, as it can only release up to 2 ATP molecules per glucose molecule compared to aerobic respiration that can release up to 38 ATP molecules per glucose molecule.

Question 15

What is the waste product for anaerobic respiration? (plants, animals and some bacteria)

Answer 15

Lactic acid

Question 16

Give the word equation for anaerobic respiration

Answer 16

Glucose–> lactic acid (+ energy released)

Question 17

What is the issue with lactic acid building up in the muscles?

Answer 17

It causes muscle fatigue and cramp.

Question 18

After exercise, what is used to break down the lactic acid? And into what?

Answer 18

Oxygen breaks down the lactic acid after exercise into CO2 + H2O which releases the rest of the energy in the process.

Question 19

What are the products of anaerobic respiration in microorganisms e.g. yeast?

Answer 19

Ethanol and carbon dioxide

Question 20

What is the word equation for microorganisms anaerobically respiring?

Answer 20

Glucose—>Ethanol + Carbon dioxide (+energy released)

Question 21

What else can anaerobic respiration in microorganisms e.g. yeast be called?

Answer 21

Fermentation

Question 22

Both forms of anaerobic respiration happen with the absence of………

Answer 22

Both forms of anaerobic respiration happen with the absence of oxygen

Question 23

What happens to cells that cannot respire?

Answer 23

They die very quickly

Question 24

What do all chemical reactions need?

Answer 24

Energy

Question 25

Which two systems in the body supply the reactants for respiration?

Answer 25

The circulatory system and the respiratory system.

Question 26

What allows the oxygen and glucose to move into the cells via diffusion?

Answer 26

The capillaries