TUTTEE ACADEMY LOGO
broken image
  • Home
  • About Us
  • Subjects 
    • CHEMISTRY
    • BIOLOGY
    • PHYSICS
    • MATHEMATICS
    • PSYCHOLOGY
    • ECONOMICS
    • BUSINESS
    • COMPUTER SCIENCE
    • CHINESE
    • ENGLISH
    • SPANISH
    • IBDP IA / EE
    • IBDP TOK
    • ONLINE TUTORIAL
  • Exam Boards 
    • IBDP
    • IBMYP
    • IGCSE & GCSE
    • HKDSE
    • GCE A-LEVELS
  • Courses 
    • IBDP Tuition
    • GCE A-Level Tuition
    • IBMYP Tuition
    • I/GCSE Tuition
    • HKDSE Tuition
  • Admission Test Prep 
    • PREDICTED GRADE
    • SAT / SSAT
    • UKISET (UK)
    • BMAT
    • UKCAT / UCAT
    • LNAT
    • TMUA (Cambridge)
  • Student Results 
    • IBDP STUDENT RESULTS
    • IGCSE & GCSE MATHEMATICS
    • A-LEVEL STUDENT RESULTS
    • IGCSE STUDENT RESULTS
    • GCSE STUDENT RESULTS (UK)
    • HKDSE STUDENT RESULTS
    • OUR STORIES
  • Question Bank
  • Resources
SCHEDULE A LESSON NOW

I/GCSE Biology Respiration

Aerobic & Anaerobic Respiration

· IGCSE Biology,IGCSE,biology,respiration,Breathing

Respiration and Breathing

Energy Content per gram of food (J) = 4.2 x temp. Rise x 20/ mass of food

Respiration

In I/GCSE biology, there are two types of respiration;

  • Aerobic Respiration
  • Anaerobic Respiration

Aerobic Respiration takes place in living cells, inside the mitochondria, so is not present in bacteria or viruses.

Anaerobic Respiration takes place in skeletal muscles, (in arm or leg muscles), and in yeast cells.

Respiration happens so that the following functions can occur;

  • Movement,
  • Growth,
  • Sensitivity,
  • Excretion,
  • Reproduction,
  • Nutrition.

We know that respiration has occurred when;

  • CO2 is produced - breathe into limewater to tell whether it is present.
  • Heat is produced.
  • Glucose/ oxygen are used up.

Aerobic Respiration

In IGCSE biology, you need to understand that:

 

Respiration is a process that takes place in all living cells. Respiration transfers energy from food molecules in animals and in plants. The energy from respiration is used to make smaller molecules from large ones, to let muscles contract, and to keep a constant muscle temperature. Respiration releases energy from food molecules in cells.

 

Glucose + Oxygen  --> CO2 + water + energy

Anaerobic Respiration

Anaerobic respiration occurs in the skeletal muscle cells. The main difference between them is that Aerobic respiration uses oxygen, while anaerobic respiration doesn’t

Glucose --> Lactic Acid + a little energy

You respire anaerobically when you are exercising hard, and your muscles struggle to get the oxygen to do aerobic respiration. (the heart and lungs struggle to put oxygen in the blood, and then pump it around the blood.

Without the oxygen, the glucose transfers to lactic acid, with a little energy. The problem is that the lactic cid builds up, and doesn’t let the muscles contract correctly, meaning that you get a ‘stitch’.

This lactic acid is poisonous, and must be removed. This is done by the body moving it to the liver, and then breaking it down using oxygen. This is called oxygen debt.

End of this topic!

broken image

CLICK HERE TO LEARN MORE ABOUT OUR I/GCSE BIOLOGY COURSES

SIGN UP FOR AN I/GCSE BIOLOGY TRIAL NOW
Subscribe
Previous
I/GCSE Physics: Forces in Motion
Next
IB Chemistry - Chromatography
 Return to site
Profile picture
Cancel
Cookie Use
We use cookies to improve browsing experience, security, and data collection. By accepting, you agree to the use of cookies for advertising and analytics. You can change your cookie settings at any time. Learn More
Accept all
Settings
Decline All
Cookie Settings
Necessary Cookies
These cookies enable core functionality such as security, network management, and accessibility. These cookies can’t be switched off.
Analytics Cookies
These cookies help us better understand how visitors interact with our website and help us discover errors.
Preferences Cookies
These cookies allow the website to remember choices you've made to provide enhanced functionality and personalization.
Save