BIOL 4263 Chapter : BIOL 4263 Lab 6 Rocky Intertidal
Document Summary
Influencing neurotransmitter reuptake or destruction: examples of drugs that alter synaptic transmission, cocaine: blocks reuptake of neurotransmitter dopamine at presynaptic terminals, tetanus toxin: prevents release of inhibitory neurotransmitter gaba, affecting skeletal muscles. Spastic paralysis (lockjaw: strychnine: competes with inhibitory neurotransmitter glycine at postsynaptic receptor site. In the tyrosine kinase pathway, the actual receptor has kinase activity, meaning it physically phosphorylates the substrate upon binding of a ligand to the receptor. So, the receptors in the tyrosine kinase pathway are also enzymes. Ligand binding to receptors triggers a process called dimerization, where one receptor combines with another. Light-activated rhodopsin for night vision: thousands of odorant receptors, receptors for hormones, receptors for neurotransmitters, classic example is the epinephrine receptor: The rest (whatever response ensues) is up to the cell: acetylcholine, has different effects on skeletal muscle vs. heart muscle, causes skeletal muscle to contract.
