psych ch2 page 1+2+3

What is the three main functions of the nervous system?
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What is the three main functions of the nervous system?
- recieve information
-process information
- coordinate a responce
What is the central nervous system consist of and what is its functions?
- brain: processes information and directs actions within the body

- spinal cord: connects brain and periphal nervous system and initates spinal relfexes
Which part of the nervous system coordinates the activity of the entire nervous system?
brain
Define and describe the brain
The brain is an intricate network of cells that processes information through neural pathways from the body
What is a neural pathway?
One or more circuts of interconnected neurons that form communication networks
Define spinal cord and describe its two main functions
A bundle of nerve tissue that extends from thr base of the brain to the lower back
It recieves recieves sensory information from the body via the pns
It recieves motor information from the brain and sends to relevant parts of thr body to control muscles organs and glands
What happens when the spinal cord is injured?
The brain loses both sensory input from and control over the body
This athlete has restricted movement due to paraplegia caused by spinal cord damage. Explain the athlete's restricted movement with reference to the somatic nervous system.
Athlete's motor information can't be sent from the central nervous system cos his spinal cord is damaged and the message can't get to his brain cos it has to pass the spinal cord
Describe the Peripheral Nervous System and state its main function
A network of nerves out of the central nervous system
it carries sensory information to and from the central nervous system
Distinguish between the afferent and efferent information with reference to the type of information and the direction in which it is transmitted.
Sensory information is called afferent, and information goes to the CNS

Motor information is called efferent and information leaves the CNS
State the two subdivisions of the Peripheral Nervous System and describe their functionSomatic nervous system: carries sensory information to CNS and motor information from CNS autonomic nervous system: connects CNS to the body internal organs and glandsWhenever you reach to pick up a glass of water on a table, both the sensory and motor functions of the somatic nervous system are involved. Explain both the sensory and motor roles in grasping the glassCarries sensory information to the brain thinking pick up the glass then motor information is sent from the CNS to the skeletal muscles to then pick up the glassWhat is an important feature of the ANS?A control system that acts and regulates organs muscles and glandsWhat is the difference in function between the SNS and the ANS? (initiate and regulate)Somatic nervous system carries sensory information to CNS and motor information from the CNS whereas the autonomic nervous system connects the CNS to the body's internal organs and glands and it's self-regulatingIs the ANS completely self-regulating?yesWhat is biofeedback?A process where a person receives feedback about the state of an internal bodily activity that normally occurs automaticallyState the two divisions of the ANS (autonomic nervous system) and describe their functionSympathetic nervous system: increasing the activity of most visceral muscles (preparing body for action) parasympathetic nervous system: decreasing the activity of most visceral muscles (calms body after action)Explain why it can take longer for the parasympathetic nervous system to 'slow down' bodily functions than it does for the sympathetic nervous system to 'speed up' bodily functions.- lingering presence of hormones that are released when sympathetic nervous system is activated - they remain in the bloodstream for some time after the threat has passed