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Recall Details of Anaerobic Respiration

In this worksheet, students will recall what anaerobic respiration is.

'Recall Details of Anaerobic Respiration' worksheet

Key stage:  KS 4

GCSE Subjects:   Biology: Single Subject, Biology: Combined Science

GCSE Boards:   Pearson Edexcel

Curriculum topic:   Exchange and Transport in Animals

Curriculum subtopic:   Exchange and Transport in Animals

Difficulty level:  

Worksheet Overview

QUESTION 1 of 10

Did you know that Usain Bolt is currently the fastest sprinter in the world? He ran 100 metres in a record 9.58 seconds!

 

Image of athletes running

 

In order to do this, Usain Bolt’s muscles need to respire super quick. He needs all that energy to sprint so fast. But his body can’t keep up with these demands, it can’t respire fast enough. This is where anaerobic respiration steps in. 

 

Image of females exercising

 

Anaerobic respiration is where glucose breaks down but without oxygen. Energy is released but not as much as in aerobic respiration. Lactic acid is produced instead of carbon dioxide and water. Lactic acid can cause painful cramps, something we feel in our muscles that stops us from carrying on. To get rid of the lactic acid the person will breathe in deeply in order to get a good supply of oxygen. You have to keep breathing hard for a while after you stop exercising to get oxygen into your muscles to convert the painful lactic acid which has built up, to harmless carbon dioxide and water. The amount of oxygen needed to do this is called oxygen debt.

Anaerobic respiration can be represented by the equation

 

Glucose → Lactic acid + Energy

 

The reactant in anaerobic respiration is glucose. The product is lactic acid. Energy is also released.

Anaerobic respiration occurs in the cytoplasm of the cell and not the mitochondria like in aerobic respiration. 

 

In the following activity, you will recall details of anaerobic respiration.

What is the name of X in the equation below?

Image of anaerobic respiration equation

 

Water

Carbon Dioide

Lactic Acid

Name the reactant involved in anaerobic and aerobic respiration.

 

Glucose

Oxygen

Carbon Dioxide

Image of oxygen bubbles

 

There are two types of respiration, aerobic and anaerobic.

Which type of respiration needs the reactant oxygen?

 

Glucose is an important reactant in respiration. Where does this glucose come from?

Fill in the blanks below describing anaerobic respiration. 

 

Karl is at the gym exercising. After a while on the treadmill, he gets a cramp in his legs. Why does this happen?

Karl's leg muscles aren't receiving enough oxygen, so start to respire aerobically

Karl's leg muscles aren't receiving enough oxygen, so start to respire anaerobically

Carbon dioxide is produced which starts building up in the muscles causing pain

Lactic acid is produced which starts building up in the muscles causing pain

What does aerobic and anaerobic respiration have in common?

 

Glucose is a reactant

Oxygen is a reactant

Energy is released

Water is released

The human body can't rely on anaerobic respiration for most of its energy. Why do you think that is?

 

 

Because anaerobic respiration is unreliable

Because anaerobic respiration doesn't release as much energy as aerobic respiration

Because aerobic respiration doesn't release much energy

 

Karl is at the gym exercising. After a while on the treadmill, he gets a cramp in his legs. How does Karl get rid of this cramp? 

Karl has to stop exercising and breathe hard to get rid of the lactic acid that has built up in his leg muscles

Karl has to carry on exercising to get rid of the lactic acid that has built up in his leg muscles

Karl needs to get used to the pain and carry on

Why is less energy released in anaerobic respiration in comparison to aerobic respiration?

 

 

It's harder to release energy for anaerobic respiration

The glucose molecules are fully broken down to release energy

The glucose molecules aren't fully broken down to release energy

  • Question 1

What is the name of X in the equation below?

Image of anaerobic respiration equation

 

CORRECT ANSWER
Lactic Acid
EDDIE SAYS
There's only one product in anaerobic respiration, lactic acid. Hopefully, this should make it easier to remember!
  • Question 2

Name the reactant involved in anaerobic and aerobic respiration.

 

CORRECT ANSWER
Glucose
EDDIE SAYS
Glucose is needed for respiration, however, in anaerobic respiration, it's not broken down completely giving less energy.
  • Question 3

Image of oxygen bubbles

 

There are two types of respiration, aerobic and anaerobic.

Which type of respiration needs the reactant oxygen?

 

CORRECT ANSWER
aerobic
EDDIE SAYS
Try to remember: Aerobic: using oxygen Anaerobic: without oxygen
  • Question 4

Glucose is an important reactant in respiration. Where does this glucose come from?

CORRECT ANSWER
EDDIE SAYS
Our food is a source of glucose, without it, we wouldn't be able to respire!
  • Question 5

Fill in the blanks below describing anaerobic respiration. 

CORRECT ANSWER
EDDIE SAYS
This activity is useful for making revision notes. Have a few tries if you didn't get it correct the first time around.
  • Question 6

 

Karl is at the gym exercising. After a while on the treadmill, he gets a cramp in his legs. Why does this happen?

CORRECT ANSWER
Karl's leg muscles aren't receiving enough oxygen, so start to respire anaerobically
Lactic acid is produced which starts building up in the muscles causing pain
EDDIE SAYS
Lactic acid will cause pain! Our body won't be able to tolerate a build-up of lactic acid. The only option is to breathe deeply to break up the lactic acid
  • Question 7

What does aerobic and anaerobic respiration have in common?

 

CORRECT ANSWER
Glucose is a reactant
Energy is released
EDDIE SAYS
Energy is pretty much the whole point of respiration, the amount of energy differs, however, depending on the type of respiration that occurs.
  • Question 8

The human body can't rely on anaerobic respiration for most of its energy. Why do you think that is?

 

 

CORRECT ANSWER
Because anaerobic respiration doesn't release as much energy as aerobic respiration
EDDIE SAYS
Aerobic respiration is more reliable as the amount of energy released is much greater than anaerobic respiration.
  • Question 9

 

Karl is at the gym exercising. After a while on the treadmill, he gets a cramp in his legs. How does Karl get rid of this cramp? 

CORRECT ANSWER
Karl has to stop exercising and breathe hard to get rid of the lactic acid that has built up in his leg muscles
EDDIE SAYS
You have to keep breathing hard for a while after you stop exercising to get oxygen into your muscles which converts the painful lactic acid to harmless carbon dioxide and water.
  • Question 10

Why is less energy released in anaerobic respiration in comparison to aerobic respiration?

 

 

CORRECT ANSWER
The glucose molecules aren't fully broken down to release energy
EDDIE SAYS
How did you get on? In anaerobic respiration, less energy is released as glucose isn't broken down fully.
---- OR ----

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