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12 Cards in this Set
- Front
- Back
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Give three structures found in prokaryotic cells
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1. Mucus Capsule
2. May have a flagellum 3. Contains plasmids |
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Cholera: How does the increased secretion of chloride ions cause diarrhoea
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Chloride ions diffuse into lumen
Water potential of lumen decreases Water moves from cells to lumen |
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The mixture used to make the ORS contains glucose, what other substance must be present
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Mineral ions
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Why must boiled water be used to make an ORS?
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It Kills/destroys bacteria
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What happens to the shape of the diaphragm when inhaling?
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It flattens
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How might a graph show that pulmonary ventilation has changed?
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Breathing rate increases
Tidal volume increases Pulmonary ventilation= breathing rate x tidal volume |
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What type of bond joins amino acids together in a polypeptide?
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Peptide bond
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There are lots of mitochondria in a pancreas cell. Explain why?
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Site of aerobic respiration
Release energy in the form of ATP Active transport against the concentration gradient |
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Why is tissue homogenised in ultracentrifugation?
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Breaks open cells to release organelles
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Why is the resulting suspension filtered?
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Removes cell debris/ complete cells or tissue
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Why must the suspension be kept ice cold during the process?
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Reduces and prevents enzyme activity
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Why must an isotonic solution be used?
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Prevents osmosis and the net movement of water
Organelle is damaged by shrivelling or bursting |
