6 Questions
What is the physiological change that occurs due to mechanical, chemical, or electrical disturbances in nerve impulse?
Polarization
Which ion is more permeable in the resting neuron, resulting in its negative charge?
K⁺
What is the role of myelin sheath in neurohumoral transmission?
Acts as an insulator, speeding up conduction
How does depolarization occur in a neuron during action potential?
Opening of Na⁺ channels allowing Na⁺ influx
What process involves the release of transmitter, enzymes, and proteins into the junctional cleft?
Transmitter Release
Which event leads to Excitatory Postsynaptic Potential (EPSP) by causing depolarization?
Increased Na⁺ permeability
Study Notes
Neurophysiological Changes
- A change in the nerve impulse occurs due to mechanical, chemical, or electrical disturbances, leading to a physiological response.
Resting Neuron Properties
- Potassium ions are more permeable in the resting neuron, resulting in its negative charge.
Myelin Sheath Function
- The myelin sheath acts as an insulator, facilitating rapid transmission of nerve impulses in neurohumoral transmission.
Depolarization During Action Potential
- Depolarization occurs in a neuron during action potential when the membrane potential becomes less negative, reaching a threshold potential, allowing the neuron to fire.
Neurotransmitter Release
- Exocytosis is the process that involves the release of transmitters, enzymes, and proteins into the junctional cleft.
Excitatory Postsynaptic Potential (EPSP)
- The binding of neurotransmitters to receptors on the postsynaptic neuron leads to Excitatory Postsynaptic Potential (EPSP) by causing depolarization.
Learn about the process of impulse conduction in neurohumoral transmission including nerve impulse, nerve impulse conduction, polarization, and depolarization. Explore how physiological changes and electrical disturbances lead to action potential.
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