0
There are two basic reasons. One is that chemical transmission only affects the side in the synapse that have specific receptors for the neurotransmitter released, secondly the presynaptic terminal has been depolarized and is in it's refractory period, where it can not again fire. This is also the reason why the travelling wave of the action potential only travels from the axon hillock where the AP is generated towards the nerve terminal.
There is, however, one caveat to this 'rule'. In the CA1 region of the hippocampus there is a retrograde signal from the postsynaptic neuron back to the presynaptic side using the gas NO as the 'transmitter'.
Wiki User
∙ 14y ago
Wiki User
∙ 13y agoTo better understand this logic...think of headphones- you can listen with them when they are plugged into something, but the sound cannot travel the opposite way like a microphone. The synapse is like a one-way street. The signal can only go one way.
Wiki User
∙ 7y agoThis means that the flow of a nerve impulse will travel only in one direction.
Add your answer:
Earn +20 pts
What is an electrical synapse?
Chemical synapses are much slower to react to stimuli. However chemical synapses transmit a signal with constant strength or even a signal that get stronger. This is called "gain." Electrical synapses are faster but have no "gain," the signal gets weaker as it travels along the synapse to other neurons. Electrical synapses are only used for applications where a reflex must be extremely fast. They are simple and allow for synchronized action. A benefit of electrical synapses is they will transmit signals in both directions. Chemical synapses have many important advantages as well. They are more complex and vary their signal strengths. Their functions are influenced by chemical outputs in the nervous system. Chemical synapses are the most common type.
It is said that synaptic connections form so quickly in the babys brain that by the time the baby is three it will have twice as many synapses as it will need later on How are these extra synapses?
they are eliminated when they are not used
How the brain connects things together?
With the Nervous System.
Part of the nerve cell that first receives the nervous impulse is the?
The dendrite of a neuron usually receives a chemical signal from another neuron, although a cell body (soma), or sometimes even an axon, of another neuron can receive the signal.Synapses which occur between an axon and a dendrite are called axodendritic synapses, while synapses between an axon and a cell body are called axosomatic synapses, and synapses between an axon and an axon are called axoaxonic synapses.
What is a statement regarding synapses?
Synapses are the connections between nerve cells. They transmit information from one nerve cell to the next. However, all nerve cells receive and make many synapses, so what the nerve cell actually does with the incoming signals can be quite complicated.
Why is conduction at synapses one way?
Neurotransmitters are only produced from one side.
Factors that effect reaction time?
The sensitivity of the receptors, velocity of nerve conduction, and the number of neurons and synapses involved to name a few.
How is one-way conduction at synapses ensured?
Absolute refractory period (time which local area of the membrane has surpassed the threshold potential and will not respond to any stimulus).
A 36 year old woman has a disease that affects the levels of acetylcholine in her synapses and neuromuscular junctions What is a potential consequence of this disease?
abnormal conduction of signals from neurons to muscles
What is the speed of conduction through a reflex arc slower than the speed of conduction of an action potential along an axon?
First, do you're own anatomy homework in the future. Second, the number of synapses effects the overall time it takes for the signal to go through the reflex arc.
What actors and actresses appeared in Oneway Ticket - 2007?
The cast of Oneway Ticket - 2007 includes: Svante Martin Mai Ohta Janne Ravi
How is radiation conduction and convection?
energy will always be transferred
Does conduction Happen better in metals or plastics?
Electrical conduction in metals nearly always (you can have conducting polymers keep in mind)
What type of music helps you to sleep?
It is oneway or another.
How is conduction convection and radiation different?
energy will always be transferred
Where does synapses take place?
The synapses take place in the spinal cord
How much PIA oneway ticket from Islamabad to JFK?
100000
