6 Questions
What is the resting membrane potential (RMP) for a medium size nerve?
-70mV
What is the minimal intensity of stimulus needed to excite the nerve and produce action potential called?
Threshold stimulus
What occurs due to the slow closure of K+ channels and continuous outflow of K+?
Hyperpolarization
What is the difference in electric potential between the inside and outside of the membrane of the nerve under resting condition with negative inside in relation to outside called?
Resting membrane potential (RMP)
What produces local response (local changes in membrane potential) when the nerve is stimulated by a subthreshold?
Depolarization
What causes depolarization in a neuron?
Inflow of Na+ from outside to inside
Study Notes
Resting Membrane Potential (RMP)
- The resting membrane potential (RMP) of a medium-sized nerve is typically around -70mV.
Stimulus Intensity
- The minimal intensity of stimulus needed to excite the nerve and produce an action potential is called the threshold stimulus.
Potassium Channels
- The slow closure of K+ channels and continuous outflow of K+ leads to the repolarization of the neuron.
Electric Potential
- The difference in electric potential between the inside and outside of the membrane of the nerve under resting conditions is called the resting potential, with the inside being negative in relation to the outside.
Local Response
- A subthreshold stimulus produces a local response, which are local changes in membrane potential.
Depolarization
- Depolarization in a neuron is caused by an inward flow of positively charged ions (e.g. Na+ or Ca2+) or an outward flow of negatively charged ions (e.g. Cl-).
Test your knowledge of neuron anatomy and action potential physiology, including the resting membrane potential and the components of a neuron. This quiz covers the basic concepts of the anatomical and physiological properties of neurons.
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