How your body dismantles complex molecules into fuel for life
In short: This video breaks down the chemical machinery of digestion, explaining how enzymes act as biological catalysts to transform large nutrients into absorbable energy.
Digestion requires breaking down large polymers—carbohydrates, proteins, and lipids—into smaller, soluble molecules that the body can actually absorb. Enzymes facilitate this by speeding up chemical reactions without being consumed in the process.
The video details specific pathways: amylase breaks starch into maltose (further processed by maltase into glucose), while proteases like pepsin and trypsin turn proteins into amino acids. Lipids are broken down by lipase into glycerol and fatty acids, aided by bile which emulsifies fats to increase surface area.
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Sources
- Summary by Intellect · source: GCSE Biology - Digestive Enzymes (2027/28 exams)
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