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प्रश्न
How nerve impulses are transferred from one neuron to the next neuron?
उत्तर
All the information from the environment is detected by the receptors, located in the sense organs such as the eyes, nose, skin and etc. Information from the receptors is transmitted as an electrical impulse and is received by the dendritic tips of the neuron. This impulse travels from the dendrite to the cell body and then along the axon to its terminal end. On reaching the axonal end, it causes the nerve endings to release a chemical (neurotransmitter) that diffuses across a synapse and starts a similar electrical impulse in the dendrites of the next neuron, then to their cell body to be carried along the axon.
The electrical signal reaches the brain or spinal cord. The response from the brain (or spinal cord) is similarly passed on to the effector organs such as the muscle or gland cell, that undergoes the desired response.
APPEARS IN
संबंधित प्रश्न
Differentiate between Dendrites and axons.
Distinguish between Impulse conduction in a myelinated nerve fibre and unmyelinated nerve fibre
Distinguish between Cranial nerves and spinal nerves.
Draw neat and labelled diagrams of a myelinated neuron
Differentiate between the following pair of terms:
Receptor and effector.
State whether the following statement is true (T) or false (F):
Each neuron consists of three parts called cell body, cyton and axon.
What are the advantages of having a nervous system?
Write whether the following is true or false:
Neurotransmitters are either broken down or reabsorbed after they have conducted an impulse.
Write a short note.
Autonomic Nervous System
Nerve cells do not possess ______
What does the neural tissue consist of?
Axons ____________.
Identify the INCORRECT statement regarding multipolar neuron.
As compare to medullated nerves, the conduction of impulse by non-medullated nerve fibres is ______ times faster.
What is the connective tissue covering around the nerve fascicle called?
Electrical impulse travels in a neuron from
Chemicals which are released at the synaptic junction are called ______.
Write one word for the following:
The kind of nerve carrying impulses from the brain to a gland or muscle.
Rearrange the following in correct sequence pertaining to what is given within brackets at the end.
Axon endings - Dendrites - Axon - Perikaryon - Dendron (Neuron structur)
Define the following term:
Synaptic cleft
