biology - Coordination and response
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9 Terms
central nervous system
the brain and spinal cord
peripheral nervous system
consisting of the nerves outside of the brain and spinal cord
the role of the nervous system
coordination and regulation of body functions
reflex action
a means of automatically and rapidly integrating and coordinating stimuli with the responses of effectors (muscles and glands)
reflex arc
receptor, sensory neurone, relay neurone, motor neurone and effector
sense organs
groups of receptor cells responding to specific stimuli: light, sound, touch, temperature and chemicals
hormone
chemical substance, produced by a gland and carried by the blood, which alters the activity of one or more specific target organs
adrenaline and its effects
e hormone secreted in ‘fight or flight’ situations and its effects: (a) increased breathing rate (b) increased heart rate (c) increased pupil diameter
homeostasis
maintenance of a constant internal environment
Note 
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