The role of ATP in metabolism - Function of ATP - Transport of materials across cell membranes
6 important questions on The role of ATP in metabolism - Function of ATP - Transport of materials across cell membranes
How do we call it when lipid-soluble compounds freely diffuse across membranes?
Passive diffusion
What do hydrophilic compounds need in order to cross through lipid membranes? How do we call this type of diffusion?
Transport protein, facilitated or carrier mediated diffusion.
What are the three main ways materials being transported?
Protein binding
Metabolic trapping
Active transport
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What do hydrophobic compounds transport?
Proteins or dissolved in the lipid core of plasma lipoproteins.
What does the sodium pump do?
Generates Na+ gradient across the membrane, which can transport other materials against their concentration gradient.
How can sodium ions reenter the cell?
Together with substrates (glucose/amino acids)
In exhange for compounds being exported from the cell.
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