cueFlash

Glossary of Neuro physiology

Start Studying! Add Cards ↓

What is Resting membrane Potential?
around -40 to -70
What is the nernst potential for K+
-92mV
What is the nernst potential for Na+
59mV
What is the nernst potential for Cl-
-83mV
What is the nernst potential for Ca++
134mV
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
IPSP's
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.
AP's;
all or none, only occur on axon, always depolarizing,only initiated at axon hillock, do not decay w/ distance
GP's;
amp is variable, anywhere on a neuron, can be depol/hyper

Add Cards

You must Login or Register to add cards