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प्रश्न
The action potential occurs in response to a threshold stimulus; but not at sub-threshold stimuli. What is the name of the principle involved?
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उत्तर
However, an unusual event occurs when the magnitude of the depolarization reaches a level of membrane potential called the threshold.
संबंधित प्रश्न
Distinguish between Cranial nerves and spinal nerves.
Define the term Motor neuron.
Write whether the following is true or false:
Neurotransmitters are either broken down or reabsorbed after they have conducted an impulse.
Differentiate between:
A Sensory neuron and a Motor neuron (function)
____________ are the building blocks of the nervous system.
______ is the longest cell in our body.
‘A’ is a cylindrical structure that begins from the lower end of the medulla and extends downwards. It is enclosed in bony cage ‘B’ and covered by membranes ‘C’. As many as ‘D’ pairs of nerves arise from the structure ‘A’.
(i) What is A?
(ii) Name (a) bony cage ‘B’ and (b) membranes ‘C’
(iii) How much is D?
Label the parts of a neuron in the given figure.
The mammalian nervous system uses both electrical and chemical means to send signal via neurons. Which part of the neuron receives impulses?
Name the following:
Three types of neurons
