The role of the central nervous system (CNS) and the function of neurotransmitters Flashcards
What is the role of CNS?
The brain and spinal cord. Helps the brain and body communicate with one another by passing messages backwards and forwards between them.
What is the peripheral nervous system ( PNS)?
The system of nerves to the rest of the body
What is the function of neurotransmitters?
Are chemicals that are released from neurons ( also called nerve cells) to help them to pass messages from one cell to another
Outline the roles of the following neurotransmitters
Dopamine- Lose concentration
Serotonin- Mood, too little can cause depression
Gaba- Stress, calm us down- chemical name
What is synaptic functioning?
Messages are passed throughout the nervous system, from one neuron to the next by a process called synaptic transmission. Are tiny gaps between neurons that allow the chemical message to pass between them. An electrical impose is triggered inside the cell body of neuron; the neuron then passes a small impulse along the axon towards the end of the nerve fibre. At the end of the nerve fibre is a structure called the terminal button, which is filled with tiny sacs called vesicles containing the neurotransmitters ( chemical molecules).
How neurons and synapses interact?
Neurons communicate with one another through synapses, where neurons-matters are released and passed from the axon terminal to the dendrite of the receiving neuron. This allows the brain to process thoughts and memories. The neurotransmitter travels across the gap between the two neurons ( the synapse) and upon reaching the other side attaches itself to receptor sites on the surface of the target neuron.
