Transmission of Nerve Impulses
Transmission of impulses from one neuron to another takes place through synapses. A synapse is formed by the membranes of a pre-synaptic neuron and a post-synaptic neuron, that may or may not be separated by a gap called synaptic cleft. Two types of synapses are:
Electrical synapses
The membrane of pre and post-synaptic neurons is very close. Current flows directly from one neuron to another in this synapse. This type of synapse is very rare in humans and is similar to the transmission in a single axon.
Chemical Synapses
The membranes of the pre and post-synaptic neurons are separated by a fluid-filled space called synaptic cleft. Neurotransmitters at the axonal ends are involved in the transmission of impulses at these synapses.
Neurotransmitter released at the synaptic cleft binds with the specific receptor, present on the post-synaptic membrane. New potential ( either excitatory or inhibitory) is generated at the postsynaptic neuron by opening ion channels.
Class 11 Biology NCERT Notes Chapter 18 – Neural Control and Coordination
NCERT Notes for Class 11 Biology Chapter 18 – Neural Control and Coordination: The neural system controls and coordinates various functions, and homeostatic and metabolic activities of all the organs in the body. Neurons are the functional unit of the neural system. The human nervous system is divided into two parts: The central nervous system (CNS) and the Peripheral nervous system (PNS). You will find neural control and coordination class 11 notes self-study here. Also, see the solutions of NCERT Class 11 Biology Chapter 18: Neural Control and Coordination.
Table of Content
- Neural System
- Human Nervous System
- Neurons
- Generation and Conduction of Nerve Impulse
- Transmission of Nerve Impulses
- Central Nervous System
- FAQs on Neural Control and Coordination
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