Nervous System Flashcards
What is CENTRAL nervous system made up of?
- Brain
- Spinal cord
What is the function of the CNS?
- It gives the order for you to act.
What are the 3 components that make up the diencephanion?
- Thalamus
- Hypothalamus
- Pituriary gland
What does the peripheral nervous stem consist of?
- Consists of all the NERVES that branch off from the BRAIN and SPINE
- (enables the nervous system to communicate with the rest of the body)
What does the peripheral nervous system take part in?
- COMMUNICATION (your nervous system is set up to work in both directions)
What are the 3 overlapping function GROUPS of the nervous system?
- SENSORY INPUT
- INTEGRATION
- MOTOR OUTPUT
What is the function of the nervous system? (x3 points)
- Controls our actions when asleep/awake
- Sends instructions to control actions along neurones as impulses
- Is targeted and specific
What does the sensory (AFFERENT) division do?
- Picks up the sensory stimuli
- The sensory neurones send messages towards the CNS
What grouped function is this an example of:
- A spider walking across your leg
- SENSORY INPUT
(sensory input detect this)
What grouped function is this an example of:
- Shaking your leg to get a spider off your skin
- MOTOR OUTPUT
(this happens when your nervous system
activates certain parts of your body)
What is the integration function?
- The nervous system processes the input and decides what to do about it.
What does the motor (EFFERENT) division do? (x2)
- Sends directions from your brain to the muscles to make you react.
- Transmit impulses away from the CNS and out to the bosies muscles and glands.
What is the motor (EFFERENT) division called?
- SOMATIC (voluntary) which rules the skeletal muscles
What does the AUTONOMIC (involuntary) division do?
- Keeps your heart beating, your lungs breathing and your stomach churning.
What does the parasympathetic division do to the body?
- Gets the body fired up and ready for action
What does the sympathetic division do to the body?
- Relaxes the body and talks it down.
Where are inter-neurones (association neurones) found?
- CNS
What are the most abundant type of neruones?
- Inter-neurons (association neuron’s)
What do interneurons do? (association)
- Transmit impulses between sensory and motor neurones
What is the difference between sympathetic and parasympathetic?
- SYMPATHETIC–> quick response mobilising system
- PARASYMPATHETIC–> slowly activated dampening system
What is the autonomic system made up of?
- Afferent and efferent vessels that run between smooth and cardiac muscle.
