Nervous System Flashcards
what part of your eye uses small muscles to change its shape so that you can focus on near or distant objects?
lens
the two divisions of the peripheral nervous system
somatic and autonomic
which of the following is the function of the cerebrum
control conscious activities in the body
what are sense organs a part of?
PNS
a cell that carries messages through the nervous system is
neuron
function of neurotransmitters
transmit nerve impulses across synapses
what begins when a neuron is stimulated by another neuron or its environment
an impulse
when an action potential reaches the end of a neuron, it triggers the release of…
neurotransmitters
what is the smallest structional and functional unit of the nervous system
neuron
reflex
a quick automatic response to a stimulus
chemicals used by a neuron to transmit messages across a synapse
neurotransmitters
hypothalamus
the control centre for the recognition of hunger, thirst, fatigue, and body temperature
reflex arc
simple nerve pathways
is responsible for our reflexes
coordinated response
produced when a sensory neuron connects to a range of neurons within the CNS
reflex arc process
- Receptors detect a stimulus and generate a nerve impulse
- Sensory neurons conduct a nerve impulse to the CNS along a sensory pathway
- Sensory neurons enter the spinal cord through the dorsal route
- Sensory Neurons forms a synapse with an interneuron
- Inter neuron forms a synapse with a motor neuron that leaves the spinal cord through the ventral route
- The motor neuron carries impulses to an effector which produces a response
