Glossary of Neuro physiology
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- What is Resting membrane Potential?
- around -40 to -70
- What is the nernst potential for K+
- What is the nernst potential for Na+
- What is the nernst potential for Cl-
- What is the nernst potential for Ca++
- What are the two forces that determine the resting membrane potential?
- Diffusional Force (chemical force) and Electrical Force
- At what state do we have no NET movement of ions?
- Equilibrium potential state
- Explain what Depolarization is?
- the neuron inside has become more positive
- Explain what hyperpolarization is?
- the neuron inside has become more negative
- Explain what repolarization is?
- the neuron inside has returned to RMP
- What are the two types of electrical signals that occur in neurons?
- graded potentials (passive)
action potentials (active)
- Name three main types of gated channels.
- Ligand gated channels
Voltage gated channels
Sensory-stimulus gated channels
- Openining of the gated channels results in a change of membrane permeablitiy, so what happens durring hyperplorization?
- Open Cl- channels or K+ channels
- Openining of the gated channels results in a change of membrane permeablitiy, so what happens durring depolarization?
- Open of Na+ channels or Ca++ channels
- What are the two types of graded potentials?
- EPSP's and IPSP's are measured and summed at what part of a neuron?
- Axon Hilluck
- Name some differences between Action Potentials and graded Potentials.
all or none, only occur on axon, always depolarizing,only initiated at axon hillock, do not decay w/ distance
amp is variable, anywhere on a neuron, can be depol/hyper
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