what does part a of the central nervous system consist of?
the brain and the spinal cord
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what is the cerebral cortex involved in?
a variety of higher cognitive, emotional, sensory, and motor functions
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the brain is divided into how many hemispheres?
two that symmetrical
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what is the left hemisphere associated with?
language, the rational half of the brain, analytical thinking, logical abilities
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what is the right hemisphere associated with?
musical and artistic abilities
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these are divided up into how many lobes?
four
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what is the spinal cord?
a white bundle of nerves, which runs from your brain down a canal in your backbone
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how long is the spinal cord roughly?
40cm
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what is the main function of the spinal cord?
to relay information about what's happening inside and outside your body to and from your brain
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what is the spinal cord also involved in?
reflex actions, such as a startle response
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what is the PNS divided into?
the somatic nervous sympathetic and the autonomic nervous system
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what is the somatic nervous system?
part of the PNS which is concerned with the interaction of the outside world
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what does the somatic nervous system control?
the voluntary movement of skeletal muscles.
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what does the somatic nervous system consist of?
nerves that carry messages from the eyes, ears, skeletal muscles and the skin to give the CNS experience of its environment
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what is the autonomic nervous system?
part of the PNS which controls involuntary movement from non-skeletal muscles, for example the smooth muscles that control the intestines, bladder, pupil size etc and the cardiac muscle
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the ANS is split into two further systems, what are they?
the sympathetic and parasympathetic nervous system
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when is the sympathetic nervous system activated?
situations requiring arousal and energy (fight or flight)
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what does the sympathetic nervous system produce in the fight or flight?
increased heart and respiratory (breathing) rate, increased blood flow to the muscles and pupil dilation
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when is the parasympathetic nervous system activated?
soon after the threat of danger has passed
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what does it allow to happen?
the body to return to homeostasis- heart and respiratory rate decreased to normal levels and blood flow decreased. pupils return to normal size
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why is this system vital?
individual to conserve energy and not to become exhausted.
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Other cards in this set
Card 2
Front
what is the cerebral cortex involved in?
Back
a variety of higher cognitive, emotional, sensory, and motor functions
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