central nervous system (CNS)
peripheral nervous system (PNS)
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what makes up the central nervous system and what's it responsible for?
brain and spinal cord
complex commands and decisions
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what does the peripheral nervous system do?
transmitting messages to and from the CNS through neurons
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what does the autonomic nervous system (ANS) do?
- transmits information too and from internal organs.
- its autonomic because the system acts involuntarily
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what does the somatic nervous system (SNS) do?
'sends' and 'recieves' information from receptor cells in the sense organs to the CNS
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what does the endocrine system do?
instructs glands to release hormones into the blood stream
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what are hormones?
chemical substances that circulate the body in the bloodstream and only effect target organs
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an example of a hormone
Thyroxine
produced by the thyroid gland, has various effects, including increasing heart rate and raising metabolic rate
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what's the main gland in the endocrine system and what does it do?
The pituitary gland
it controls the release of hormones from other glands in the body.
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when would be a time for the ANS and endocrine system to work together
a stressful event
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what happens during a stressful event
1) stressor is percieved
2) hypothalamus (in the brain) activates pituitary gland
3) this triggers activity in sympathetic branch of the ANS
4) stress hormone is released
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what is the stress hormone and where is it released?
adrenaline
adrenal gland
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what does adrenaline do?
causes physiological changes to the body that prepare the body for fight or flight
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what is the arousal from adrenaline also known as?
sympathetic state
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what does the parasympathetic nervous system do?
works in opposition to the parasympathetic nervous system to return the body to resting state
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