Anaerobic Respiration
CONCEPTUALExplain anaerobic respiration in animals as the incomplete breakdown of glucose to lactic acid when oxygen is in short supply, causing muscle fatigue; contrast this with aerobic respiration in terms of energy yield and products
Mastery Evidence
- Writes the word equation for anaerobic respiration in animals
- Explains why lactic acid causes muscle pain and fatigue
- Compares the energy released by aerobic and anaerobic respiration
- Explains oxygen debt and recovery after vigorous exercise
Assessment Prompt
“If [child] sprinted as fast as they could and their legs started to burn and ache afterwards, could they explain what's happening inside their muscles — why there isn't enough oxygen, and what the body produces instead?”
Curriculum Standards1 alignment
KS3.Sci.Bio.GasExchange.6The national curriculum in Englandaerobic and anaerobic respiration in living organisms, including the breakdown of organic molecules to enable all the other chemical processes necessary for life
Prerequisites1
- Aerobic RespirationhardAges 12—13
Show full prerequisite tree
- Aerobic Respiration hard
Anaerobic respiration is defined in contrast to aerobic — it is the fallback when oxygen supply is insufficient
- Parts of Plant and Animal Cells hard
Diffusion in and between cells requires knowing about the cell membrane as a selectively permeable boundary
- Cells Under the Microscope hard
Understanding cell components requires first knowing that cells are the fundamental unit of life
- Gas Exchange & Breathing hard
Aerobic respiration uses oxygen obtained through gas exchange — the supply mechanism must be understood first
- Cells to Organ Systems soft
The gas exchange system is an organ system — hierarchy concept provides structural context
- Plant Cells vs Animal Cells hard
The cell-to-organism hierarchy builds on understanding that different cell types exist
- Parts of Plant and Animal Cells hard
Comparing plant and animal cells requires knowing the components found in each
- Cells Under the Microscope hard
Understanding cell components requires first knowing that cells are the fundamental unit of life
- How Diffusion Works hard
Gas exchange at the alveoli is driven by diffusion — the mechanism must be understood first
- Parts of Plant and Animal Cells hard
Diffusion in and between cells requires knowing about the cell membrane as a selectively permeable boundary
- Cells Under the Microscope hard
Understanding cell components requires first knowing that cells are the fundamental unit of life
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