Concept explainers
To discuss:
Three ways in which synaptic transmission is ended.
Introduction:
Turning off the stimulus on time is as important as stimulating a postsynaptic cell, or else the post synaptic neuron will fire indefinitely, leading to a physiological coordination breakdown. The neurotransmitter molecule binds to the receptor for just 1 ms or so, then it dissociates from the receptor. If a presynaptic cell releases the neurotransmitter continuously, one molecule is rapidly replaced by another neurotransmitter molecule and the postsynaptic neuron is re-stimulated. This is one of the ways of stopping synaptic transmission - this terminates the addition of a new neurotransmitter molecule and getting rid of which is there already. The first step is attained by a signal cessation in the presynaptic neuron. The second step is achieved by three modes that are explained below.
Want to see the full answer?
Check out a sample textbook solutionChapter 12 Solutions
ANATOMY & PHYSIOLOGY V1. W/CONNECT
- Why the same neurotransmitter can have different effects on different cells.arrow_forwardWhen action potentials arrive at a synapse between a neuron and another cell, they stimulate the release of molecules of a ________ that diffuse over to that cell.arrow_forwardA neuron responds to adequate stimulation with _______, a type of self-propagating signal.arrow_forward
- an example of 2nd messenger concept map with 10 termsarrow_forwardHow one action potential triggers another; how the continuous conduction seen in unmyelinated nerve fibers result from a chain reaction of action potentials; and what normally prevents the signal from traveling backward to the neurosoma.arrow_forwardA/An _____ synapse is formed when a presynaptic neuron synapses with the cell body of a postsynaptic neuronarrow_forward
- Briefly describe, in the correct sequence, the events thatoccur in synaptic transmission.arrow_forwardContrast the two types of summation at a synapse and explain how they function in synaptic decision making.arrow_forwardfill in the blank.......... is a reflection of the unequal distribution of positive and negative ions across the plasma membrane of the axons (axolemma)arrow_forward
- Human Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage LearningHuman Biology (MindTap Course List)BiologyISBN:9781305112100Author:Cecie Starr, Beverly McMillanPublisher:Cengage Learning