What you’ll learn10 learning objectivesChoose one objective for a focused lesson, or study the complete topic.14.1.1Electrical impulses travel along• State that electrical impulses travel along neuronesSyllabus objective14.1.2Mammalian nervous system• Describe the mammalian nervous system in terms of: (a) the central nervous system (CNS) consisting of the brain and the spinal cord (b) the peripheral nervous system (PNS) consisting of the nerves outside of the brain and spinal cordSyllabus objective14.1.3Role of the nervous system• Describe the role of the nervous system as coordination and regulation of body functionsSyllabus objective14.1.4Sensory, relay and motor neurones• Identify in diagrams and images sensory, relay and motor neuronesSyllabus objective14.1.5Simple reflex arc in terms• Describe a simple reflex arc in terms of: receptor, sensory neurone, relay neurone, motor neurone and effectorSyllabus objective14.1.6Reflex action as a means• Describe a reflex action as a means of automatically and rapidly integrating and coordinating stimuli with the responses of effectors (muscles and glands)Syllabus objective14.1.7Synapse as a junction between two• Describe a synapse as a junction between two neuronesSyllabus objective14.1.8Structure of a synapse• Describe the structure of a synapse, including the presence of vesicles containing neurotransmitter molecules, the synaptic gap and receptor proteinsSyllabus objective14.1.9Events at a synapse• Describe the events at a synapse as: (a) an impulse stimulates the release of neurotransmitter molecules from vesicles into the synaptic gap (b) the neurotransmitter molecules diffuse across the gap (c) neurotransmitter molecules bind with receptor proteins on the next neurone (d) an impulse is then stimulated in the next neuroneSyllabus objective14.1.10Synapses ensure that impulses travel• State that synapses ensure that impulses travel in one direction onlySyllabus objective