Understanding Anaerobic Respiration in Cell Biology - Year 10 Science Lesson
Exploring the concepts of anaerobic respiration in cell biology with Ms. Merrall. Learn about the differences between aerobic and anaerobic respiration, muscle fatigue, and oxygen debt. Discover the importance of respiration for survival, building upon previous knowledge and linking to various topics. Practice and receive feedback on key concepts.
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Remote Learning Year 10 Science (Biology) Cell Biology Lesson 2 Anaerobic respiration Ms Merrall
By the end of this lesson I will State what anaerobic respiration is. Describe the difference between aerobic and anaerobic respiration Explain muscle fatigue and oxygen debt Have the opportunity to practise and get feedback for my work
The big picture: Why is respiration so important? Builds on knowledge from previous KS3 Respiration topic It is vital for survival Part of biology that will be covered at GCSE Links to lots of topics, such as chemistry and P.E!
Do Now 1. What is the word equation for aerobic respiration? Glucose + oxygen Carbon dioxide + Water (+ energy) 2. Where does respiration occur? In cell within mitochondria 3. What does aerobic mean? With oxygen 4. What are the waste products of aerobic respiration? Water and carbon dioxide 5. What occurs in the alveoli? Gas exchange
Lack of Oxygen Lack of Oxygen 12O O6 6 + 6 O + 6 O2 2 6 H 6 H2 2O + 6 CO O + 6 CO2 2 + Energy C C6 6H H12 + Energy If the body is not able to supply enough oxygen, aerobic respiration cannot take place and energy is not released!
But we still need energy! But we still need energy! The body still has a supply of glucose. The body can harness some energy from the glucose without oxygen. A by-product called lactic acid is produced.
Anaerobic Anaerobic What do you think Anaerobic means? Anaerobic = Without Oxygen O2
Anaerobic Respiration Anaerobic Respiration The incomplete breakdown of glucose. Releases less energy than aerobic respiration approx. 5% Temporary process.
Anaerobic Respiration Equation Anaerobic Respiration Equation Glucose Lactic Acid + Energy Where does this occur? Cells In the cytoplasm
Why would we get muscle cramps? Why would we get muscle cramps? Glucose Lactic Acid + Energy Lactic acid is poisonous to muscles. It stops them contracting and relaxing. They become fatigued.
Oxygen debt? Anaerobic respiration Glucose Lactic Acid + Energy Lactic acid needs to be broken down by oxygen to allow muscles to return to normal Lactic acid + oxygen carbon dioxide + water Hence oxygen debt.
In plants and yeast.... In plants and yeast.... Ethanol + Carbon dioxide Glucose
In plants and yeast.... In plants and yeast.... Ethanol + Carbon dioxide Glucose In yeast, this is called fermentation
Aerobic Aerobic Anaerobic Anaerobic Sort the following: Sort the following: Releases the most energy Requires oxygen In plants and yeast, it releases CO2 and ethanol Releases the least energy Produces carbon dioxide and water Produces ethanol (in yeast/plants) Produces lactic acid Involves incomplete oxidation of glucose Occurs when there is no oxygen available
Progress Check Progress Check 1. What is the word equation for anaerobic respiration? 2. How much energy does it release compared to aerobic respiration? 3. What is produced during anaerobic respiration in animals? 4. What is produced during anaerobic respiration in plants/yeast? 5. How do we make use of anaerobic respiration in yeast?
Progress Check Progress Check - - answers answers 1. What is the word equation for anaerobic respiration? 2. How much energy does it release compared to aerobic respiration? 3. What is produced during anaerobic respiration in animals? 4. What is produced during anaerobic respiration in plants/yeast? 5. How do we make use of anaerobic respiration in yeast? To produce beer, wine and bread Glucose Lactic acid + Energy Approx. 5% Lactic acid + Energy Ethanol + Carbon dioxide
Your Task Complete the task at the end of this video Take a picture of your answers and email the photo to my school email address. If you are stuck, need help or feedback feel free to email me or join in on the live zoom session to go through the answers together.
By the end of this lesson I will State what anaerobic respiration is. Describe the difference between aerobic and anaerobic respiration Explain muscle fatigue and oxygen debt Have the opportunity to practise and get feedback for my work
TASK explaining muscle fatigue and oxygen debt Respiration in athletics Respiration in athletics The blood of an athlete was tested before, during and after a 400m race:
Complete the following table about each section of the race: Section of race Strategy Anaerobic or aerobic respiration? Explanation Anaerobic respiration Sudden increase in exercise, not enough oxygen, respires anaerobically, produces lactic acid, and causes increase in lactic acid levels. not enough oxygen, A to B Sprint start B to C Stops accelerating and maintains pace C to D Sprint finish D to E (after the race has finished) Warm down, then rest
