structure & function of the human nervous system
- Created by: millie walk
- Created on: 08-03-20 15:14
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- structure & function of the human nervous system
- receptor cells detect stimuli
- found in sense organs eg: eye, ear, nose, tongue & skin
- in the eye light stimulates receptors
- electrical impulses then pass to the brain along neurones (nerve cells)
- other stimulis include: sound, chemicals, temperature changes, touch and pain
- the brain coordinates responses to many stimuli
- in the eye light stimulates receptors
- found in sense organs eg: eye, ear, nose, tongue & skin
- central nervous system
- brain & spinal cord form it
- nerves contain budles or neurones
- sensory neurones carry impulses from receptors to the CNS
- motor neurones carry impulses from the CNS to effectors that respond to the impulses
- effectors may be muscles or glands
- muscles respond by contracting
- glands respond by secreting (releasing) chemicals
- effectors may be muscles or glands
- stimulis
- receptor
- sensory neurone
- coordinator (CNS)
- motor neurone
- effector
- response
- effector
- motor neurone
- coordinator (CNS)
- sensory neurone
- receptor
- receptor cells detect stimuli
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