Flashcards
Extracellular Signalling
Cards in this deck (12)
- 1Two principle forms of communication in multicellular organismshormonal
nervous - 2Hormonesextracellular signalling molecules that are secreted by one tissue into the blood
- 3Two categories hormones fall intoHydrophilic- peptide hormones (insulin, ADH, growth hormone)
Hydrophobic- steroid hormones (testosterone) - 4NeurotransmittersThe signalling molecules released during nervous communication
- 5What category do neurotransmitters fall underhydrophilic molecules
- 6Binding of hydrophobic moleculeslipid soluble and so can pass through cell membrane by diffusion
- 7target cells of hydrophobic moleculeswithin the cytoplasm or nucleus of target cell
- 8gene-regulatory proteinThe receptor for steroid hormone.
changes conformation when steroid bind to it. This activates protein so it can bind directly to DNA - 9binding of hydrophilic moleculesnot lipid soluble and so can't pass through the hydrophobic barrier of cell membrane
- 10Signal Transductioncauses change in behaviour in cell
- 11Signal transduction pathways include1.Extracellular ligand that does not penetrate through the cell membrane
2.Cell surface receptor- usually transmembrane protein
3.Conformational change in receptor when ligand binds to it. - 12most common enzyme involved in signal transductionKinases
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- Advanced Higher Biology Flashcards on Extracellular Signalling, created by hanni1995 on 07/05/2013.
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- hanni1995
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