1)Compare and contrast synaptic potentials and action potentials. How each of these encode stimulus strength. 2)Describe in...

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Biology

1)Compare and contrast synaptic potentials and actionpotentials. How each of these encode stimulus strength.
2)Describe in detail how one messenger can trigger the releaseof another second messenger.
3)On a molecular level, what absolutely refractory period? Cananother action potentials be fired during this period? Whatprinciple of AP firing is due to the absolute refractoryperiod?

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1 PROPERTY SYNAPTIC POTENTIAL ACTION POTENTIAL LOCATION dendritescell bodysensory receptors axon IONS usually NaCL or K Na and k STRENGTH proportion to strength of stimulus dissipates with distance all or none CHANNEL ligand gated mechanically gated voltage gated SUMMATION temporal and spatial none DIRECTION depolarising or hyperpolarising only depolarising 2 The first messengers usually are extracellular factors often hormones or nuerotransmitters which donot cross the membrane phospholipid bilayer but attach to it externally See Answer

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