3.1 Flashcards
what makes up the nervous system
brain
spinal chord
peripheral nerves
what is in the central nervous system
brain and spinal chord
what does the pns do
allows information to be sent to and from the CNS
summarise the action of the somatic nervous system
voluntary responses, making conscious decisions for a response some involuntary responses are involved
what does the autonomic nervous system do
regulates the internal environment by controlling structures and organs
what does antagonist mean
they work opposite each other
what type of response does the sympathetic system do
excitatory
what type of response does the parasympathetic system do
inhibitory
what happens during an excitatory response
- heart rate and blood pressure increases
- blood goes to muscles
- breathing rate increases
- adrenal gland stimulated
- sweat increases
- digestion slows
what happens during an inhibitory response
- heart rate + blood pressure decreases
- blood goes to digestive system
- digestion increases
- breathing slows
- sweat decreases
what is in the autonomic nervous system
sympathetic and parasympathetic system
what’s in the somatic nervous system
sensory amd motor areas
what is a converging neural pathway
nerve impulses from several neurons travel to one neuron
what does a converging neural pathway do
the sensitivity to signals is increased
give an example of a converging neural pathway
rods in the eyes seeing in dim light
describe a diverging neural pathway
impulse from one pathway goes to several neurons
what does a diverging neural pathway mean
the impulse can affect more than one neuron
give an example of a diverging neural pathway
fine motor control
describe a reverberating neural pathway
neurons later in the synapse with neurons earlier in the pathway
what does a reverberating neural pathway mean
allows repeated stimulation
give an example of a reverberating neural pathway
breathing
