Ch.4 Nervous Systems Flashcards
What is the structure and function of the CNS?
Contains the brain and spinal cord, the CNS controls the body by processing and responding to sensory input from the PNS.
What is the structure and function of the PNS?
Communicates information from the body to the CNS and to the body’s organs, glands and muscles.
What are motor neurons?
Neurons that communicate messages from the CNS to the muscles for movement
What are sensory neurons?
Neurons that carries information from the body and from the outside world into the CNS.
What is the sympathetic nervous system?
Is a branch of the autonomic nervous system that activates the flight, fight and freeze response.
What is the parasympathetic nervous system?
Is a branch of the ANS, responsible for maintaining our day-to-day functioning of the body such as digestion, heart rate and breathing.
What are dendrites?
Branch-like segments of a neuron which receive signals from other neurons or sensory receptors.
What is the soma?
Is the cell body and the largest part of the neuron, that controls the metabolism and maintenance of the cell.
What is an axon?
Is the part of the neuron where messages are sent along
What are glial cells?
Cells that play an important role in supporting neurons by surrounding and holding them in place.
What is the myelin?
A white, fatty, waxy substance that coats some axons, protecting them from electrical interference from other neurons.
What are terminal buttons?
Are bulb-like structures at the end of an axon which release neurotransmitters.
What is the synapse?
Is the connection between two neurons.
