Nervous System

Name: __________________ Topic: Nervous System LO:Statetherelationshipbetweenreceptors,thecentralnervoussystemandtheeffectors ● Receptoror senseorgansdetectstimulusandis stimulated, generatingnerveimpulses.● Sensoryneuronetransmitsnerveimpulsesto therelayneuronein thecentralnervous system (CNS)which consists of thebrain/spinalcord.● Beforetransmittingnerveimpulsesalongthe motorneuroneto the effector(muscles/ glands) to carry out the response. LO:Statethatthenervoussystem– brain,spinalcordandnerves,servestoco-ordinate and regulate bodily functions Concepts Summary NotesNan Hua High School Biology 1

Name: __________________ Topic: Nervous System LO:Outlinethe functionsof sensoryneurones,relayneuronesandmotorneurones ● Neurones arenervecellsthatfunctionto transmitnerveimpulses withinthenervous system.● Neurones differ inshapesandsizes.● Basic components of a neurone:o Soma –cellbodycontainingthenucleusandorganelles, whereessentialmetabolic processes occur to maintain cell survivalo Axon andDendron– nervefibreswhichare strandsof cytoplasmextendingfromthe cell bodythattransmitnerveimpulsesto otherneurones or effectorso Dendrites- short-branchednervefibresthatconvertchemicalinformationfrom other neurons or receptor cells intoelectricalnerve impulses Concepts Summary NotesNan Hua High School Biology 2

Name: __________________ Topic: Nervous System Concepts Summary NotesNan Hua High School Biology 3

Name: __________________ Topic: Nervous System Types of neurones ● Sensoryneuronestransmitnerveimpulsesfromreceptorstotherelayneuronesinthespinal cord or brain. ● RelayneuronesintheCNS(spinalcord/brain)receivenerveimpulsesfromsensoryneuronesand transmit them along the CNS to themotorneurones. ● Motorneuronestransmitnerveimpulsesfrom the CNS to the effectors(muscles/glands)for an action to occur. ● Synapse–ajunctionorconnectionbetweentwoneurones(fromanaxonto a dendron)bychemicalmeansthroughneurotransmitters Concepts Summary NotesNan Hua High School Biology 4

Name: __________________ Topic: Nervous System LO:Discussthefunctionofthebrainandspinalcordinproducingaco-ordinatedresponse as a result of a specific stimulus in a reflex action ● Reflexactionisanimmediateinvoluntaryresponsetoaspecificstimuluswithoutconscious control.● Re