Animal physiology question 1. Neurons use both graded and action potentials to carry electrical signals from...

Animal physiology question

1. Neurons use both graded and action potentials to carry electrical signals from one point to another. In a neuron, where do we find graded potentials? Where do we find action potentials? Describe the similarities and differences between these two types of signals that could be seen within an individual neuron.

Solutions

Expert Solution

1. Graded potentials are local change in membrane potentials caused as a result of depolarization or repolarization of cell due to activity of ligand gated ion channel. They occur at the dendrites of a neuron

When a cell membrane becomes less negative due to graded potential changes it results in excitatory post synaptic potentials whereas when cell membrane becomes more negative due to graded potential changes it results in inhibitory post synaptic potentials.

Action potential is an increase in membrane potential which causes Depolarization and generates an electrical impulse that propogates to other neurons.
Action potential occurs as result of voltage gated ion channels. Action potential generates at the axon of a neuron.
Graded potential occur due to Changes in ligand gated ion channels whereas action potential occur due to changes in voltage gated ion channels.
Graded potential can be hyperpolarising ir depolarising whereas action potentials are always drpolarization.
Graded potential can be summed together but action potential cannot.
Graded potential are weaker than action potential.

Sydney Mullin answered 11 months ago

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