Neurons And Synaptic Transmission

Question 1

the nervous and synaptic transmission : The nervous system

Answer 1

Consists of billion of nerves cells (neurons) which receive and pass info
Miniscule (10 billion in the brain alone)
Spaced out with little gaps called the synapse
Synapse carries chemical message from the post synaptic neuron to the pre-synaptic neuron in form of NTs
NTs-dopamine ,serotonin and GABA

Question 2

What are the structure of a neuron

Answer 2

Dendrities
sensory neuron
Axon
Cell body
-relay neuron
Cell body
Motor neuron
Axon

Question 3

What does a sensory neuron do

Answer 3

Carries nerve impulses from the sensory receptors (senses) to the spinal cord and brain

Question 4

What does a motor neuron do

Answer 4

Refers to neurons which conduct signals from the CNS to effector organs:muscle
Form synapses with muscles and control dendrities and their contraction

Question 5

what does a relay neuron do

Answer 5

Common type of neuron in the CNS
Allow sensory and motor neurons to communicate with the spinal cord and brain

Question 6

What are example of excitatory neurotransmitters

Answer 6

Acteylcholine
Noradrenaline

Question 7

What effect does the excitatory NTs play on the neuron

Answer 7

Increases the likelihood that an excitatory signal is given off

Question 8

What is the name for the effect

Answer 8

Excitatory post synaptic potential (EPSP)

Question 9

What is an example of inhibitory NTs

Answer 9

Serotonin
GABA

Question 10

What effect does the inhibitory NTs play on the neuron

Answer 10

Decreases the likelihood of a neuron firing

Question 11

What is the name for the effect

Answer 11

Inhibitory post synaptic potential (IPSP)