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OCR A Level Biology Neuronal Communication Pro Final Exam Fully Solved 2024.

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Role of neurones - Answer To transmit electrical impulses rapidly around the body to allow the organism to respond to changes in internal and external environment Parts of a general neurone - Answer Cell body, Dendron, axon, Role of the cell body - Answer To produce neurotransmitters Structure of cell body - Answer Nucleus, cytoplasm, lots of endoplasmic reticulum, mitochondria Function of dendrons - Answer To transmit electrical impulses towards the cell body Function of axons - Answer To transmit electrical impulses away from the cell body Structure of axons - Answer Cylindrical, narrow region of cytoplasm surrounded by plasma membrane Types of neurone - Answer Sensory, relay, motor Structure of sensory neurones - Answer One Dendron, one axon Structure of relay neurones - Answer Many short axons and dendrons Structure of motor neurones - Answer One axon, many short dendrites Function of sensory neurones - Answer To transmit impulses from a sensory receptor cell to a relay neurone, motor neurone or the brain


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