all or none principle of neural transmission

The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. As an action potential (nerve impulse) travels down an axon there is a change in electric polarity across the membrane of the axon. The cookie is used to store the user consent for the cookies in the category 'Performance'. This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category 'Other. Magnitude of response will always be same irrespective of strength of stimulris. This cookie is set by GDPR Cookie Consent plugin. Conduction of nerve impulse is unidirectional. The cookies is used to store the user consent for the cookies in the category 'Necessary'. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category 'Functional'. The cookie is used to store the user consent for the cookies in the category 'Analytics'. These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly. Principles of Inheritance and Variation.New Questions and Answers and Forum Categories In myelinated nerve fibers, the velocity of impulse transmission is faster because the process of depolarization occurs only at the nodes of Ranveir and, therefore, it appears as if the impulses are jumping from one node to the successive node (Fig. The cell membrane lipids form the myelin sheath.ġ. The sheath of Schwann cell wraps the axon by about 80-100 times. In the peripheral nervous system, the myelinogenesis is contributed by the Schwann cells whereas in the CNS it is being contributed by the oligodendroglial cells. Myelinogenesis is the process by which myelination of the nerve fiber takes place. reach the cell bodies in the nervous system because of the retrograde transport. Many of the viruses (rabies virus, polio), bacteria (tetanus), etc. When the transport of substance occurs in opposite direction (that is from the nerve terminals towards the cell body), it is known as retrograde transport (slowest-200 mm/day). from the cell body to the end of the nerve terminals. This type of movement of axoplasm helps for transport of neurotransmitter, proteins, etc. When the substance is transported from the cell body towards the axon terminals, it is known as anterograde transport (fastest-400 mm/day). The transport of materials within the axoplasm can occur in either direction (from the cell body towards the axon and vice versa). The protoplasm present in the axon region is known as axoplasm.

These areas are called as nodes of Ranvier. In myelinated nerve fibers, at certain places the myelin sheath is absent. Whereas in non-myelinated nerve fiber, the Schwann cell just covers the nerve fiber without wrapping. In myelinated nerve fiber, the wrapping of the axon by the myelin sheath provided Schwann cell occurs. Based on the type of neurotransmitter released from their terminals as adrenergic, cholinergic, dopaminergic, etc.

All or none principle of neural transmission