Define Excitability, conductivity,a normal threshold stimulus,summation all or none rule
Answers
Answer:
Excitability is a property of a cell, allowing it to respond to stimulation by rapid changes in membrane potential produced by ion fluxes across the plasma membrane.
Conductivity of an electrolyte solution is a measure of its ability to conduct electricity. The SI unit of conductivity is Siemens per meter.
The minimum stimulus needed to achieve an action potential is called the threshold stimulus. The threshold stimulus causes the membrane potential to become less negative (because a stimulus, no matter how small, causes a few sodium channels to open and allows some positively-charged sodium ions to diffuse in).
summation is the addition of a sequence of any kind of numbers, called addends or summands; the result is their sum or total. ... The summation of an explicit sequence is denoted as a succession of additions.
Answer:
1.capable of being readily roused into action or a state of excitement or irritability. 2 : capable of being activated by and reacting to stimuli excitable cells.
2.the degree to which a specified material conducts electricity, calculated as the ratio of the current density in the material to the electric field which causes the flow of current.
3.Threshold stimuli are of enough energy or potential to produce an action potential (nerve impulse). Suprathreshold stimuli also produce an action potential, but their strength is higher than the threshold stimuli.
4. Image result for summation all or none rule
The all-or-none law is a principle that states that the strength of a response of a nerve cell or muscle fiber is not dependent upon the strength of the stimulus. If a stimulus is above a certain threshold, a nerve or muscle fiber will fire.
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