The Nervous System 0.0 / 5 ? BiologyHuman, animal and plant physiologyA2/A-levelAQA Created by: qwerty123Created on: 10-03-16 18:17 Simple Reflex Arc A rapid, innate, automatic and protective response to a stimuli 1 of 12 Sensory Neurone carries impulses from the receptor 2 of 12 Intermediate Neurone Links the sensory neurone to the motor neurone 3 of 12 Motor Neurone Carries the impulse to the effector, which is usually muscle 4 of 12 Why are reflex actions fast? Because the neurone pathway is short - only 3 neurones 5 of 12 Why are reflex actions important? They protect the body from harmful stimuli. They are also involuntary and do not have to be learned as they are effective from birth. 6 of 12 Sensory Nervous System Carries impulses from the receptor the the Central Nervous System(CNS). 7 of 12 Motor Nervous System Carries impulses from the CNS to the effector. 8 of 12 Voluntary Nervous System Carries impulses to muscles under our voluntary control. 9 of 12 Autonomic Nervous System Carries impulses from the CNS to glands, smooth muscle, and cardiac muscle under our voluntary control. 10 of 12 Sympathetic Nervous System Stimulates effectors and so speeds up activity 11 of 12 Parasympathetic Nervous System Inhibits effectors so slows down activity 12 of 12
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