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Detailed understanding of what the action potential of a neuron. What is the opening and closing of multiple channels required?
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- How stimulation of a neuron generates a local potential; the physiological properties of a local potential.The nervous system, the major anatomical and functional subdivisions. Three functional properties found in all neurons; define the three most basic functional categories of neurons List the six types of cells that aid neuronssummary of the whole process of action potential
- Neuron(key terms:dendrites, axo,electrical signals, communication) One important structure/feature of a neuron isNeuron(key terms: dendrites, axons, electrical signals, communication) The function (or job) of a neuron isHow one action potential triggers another; how the continuous conduction seen in unmyelinated nerve fibers result from a chain reaction of action potentials; and what normally prevents the signal from traveling backward to the neurosoma.
- Difference between impulse conduction in a myelinated nerve fibre and unmyelinated nerve fibre.Graph of membrane potential versus time The graph above represent time in milliseconds. At what time (in milliseconds) is the inside of the neuron the most positive and why? Explain why the membrane potential changes at X. Explain what is happening at point C to the sodium and potassium ions and how this is affecting the membrane potential. Describe two things that contribute to the resting membrane potential.Why is the action potential conducted in only one direction in a neuron? Comments : Best of your knowledege for grasp the concept well
- Role of neurotransmission.Depolarisation & repolarisation in metaneuron - put the following events in order (from 1 to 4). Membrane potential crosses the threshold potential and an action potential is achieved. Depolarisation occurs when the applied current is sufficient to move membrane potential towards neutral. The neuron’s membrane potential drops below the initial resting membrane potential and temporarily becomes refractory to further action potentials. Membrane quickly repolarises by opening of K+ channels, allowing K+ions to leave the cell and charge separation to be re-established.Compare graded and action potentials in a typical neuron. At a minimum you should include a description of membrane potential and how it is generated, the specific ion channels and how they are involved in generating a graded or action potential, how the strength of stimulus effects the strength of the response.
