Draw a flow chart/concept map that illustrates the mechanism whereby the faulty cf gene causes the production of thick mucus with less water in it than normal.

So the flowchart should go like this:
Mutation in the CFTR gene >>>>>> Production of defective CFTR protein >>>>>> defective CFTR protein in cell membrane or no protein at all   >>>>>>>   Impaired ion transport across the cells   >>>>>>>   Cells secrete less chloride >>>>>>>   leads to more re-absorption of sodium and water into the cells   >>>>>>>   decreased hydration of mucus present outside the cells as more water is absorbed into the cells    >>>>>>>>   thick viscous mucus.

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