BIO_Ch17_LQ_e.doc - HKDSE BIOLOGY: Connecting Concepts...

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HKDSE BIOLOGY: Connecting ConceptsChapter 17Question bankStructured questionsStructured questions|!|BCELC0170000001|!|The photomicrograph shows part of a neurone.(a)Name structures A, B and C.(3 marks)(b)Name the junction where two neurones meet.(1 mark)(c)Describe how a nerve impulse is transmitted from one neurone to another.(4 marks)##ABC
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HKDSE BIOLOGY: Connecting ConceptsChapter 17Question bankStructured questions(c)When a nerve impulse arrives at a synaptic knob, it stimulates the synaptic vesiclesto release neurotransmitters.(1)Neurotransmitters diffuse across the synaptic cleft.(1)Neurotransmitters bind to specific receptor sites on the dendron of the nextneurone.(1)The dendron is stimulated to generate a nerve impulse to continue with thetransmission.(1)________(8 marks)##Skills assessedMarks(a)Analysing data3(b)Understanding basic concepts1(c)Understanding basic concepts4|!|BCELA0170000002|!|STSESI(a)Describetworoles of synapses in the nervous system.(2 marks)(b)The diagram below shows a synapse formed by two adjacent neurones.© 2019Aristo Educational Press Ltd.neurotransmitterreceptor siteaxondendronX2
HKDSE BIOLOGY: Connecting ConceptsChapter 17Question bankStructured questions(i)Name gap X.(1 mark)(ii)What is the difference between the transmission of signals along a nerve fibreand across a synapse?(2 marks)(c)Parkinson’s disease is a disorder of the central nervous system. It results fromdegeneration of neurones in a certain area of the brain and deficiency of aneurotransmitter. Symptoms of Parkinson’s disease include shaking and rigidmuscles.With reference to the roles of neurones and neurotransmitters, suggest reasons toexplain the above symptoms of Parkinson’s disease.(2 marks)(d)A scientist has isolated a new compound from the rat brain. Listtwoof the criteriathat the scientist should look for to confirm that the compound is aneurotransmitter.(2 marks)##
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HKDSE BIOLOGY: Connecting ConceptsChapter 17Question bankStructured questionsIt has to be released by presynaptic stimulation.

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