nervous system Flashcards
what is the point of the nervous system
- control all important actions
- receives, processes, stores and transmits info
what are the 2 parts of the nervous system
- peripheral (nerves)
- central (barin and spinal cord)
what is a neuron
- specialized nerve
- receives and transmits messages
- do not reproduce
- conductive
- can be stimulated
- need oxygen to live
what are the parts of a neuron
- dendrite
- axon
- cell body
- axon terminal
- myelin sheath
what is the role of a neuron
- detect stimuli
- send nerve impulses
what is stimuli
anything that can be perceived by a living organism that triggers a reaction
what is a nerve impulse
electrical signal transmitted by a neuron
what are the steps that happen to transmit a nerve impulse
- dendrites pick up stimuli and turn it into nerve impulses
- impulses then travel the neuron through the axons and then go to the axon terminal
- the nerve impulses are then transmitted from nerve to nerve through the synapse
what is a synapse
space between neurons
what is a nerve
helps transmit info between the central nervous system and other parts of the body
what is the purpose of the peripheral nervous system
connects different parts of the body to the central nervous system
what are the three different types of nerves
- sensory
- motor
- mixed
what are sensory receptors
- receive stimuli from outside and inside and turn it into nerve impulses
where are sensory receptors located
found in sensory organs
what are sensory nerves
- TRANSPORT nerve impulses from sensory receptors to the central nerve system
- receive impulses from sensory organs and internal organs