PYC1501 Oct/Nov 2013 exam paper — questions

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  1. Question 1 · The human nervous system · 2 marks

    Identify the statement about neurons that is NOT true: option 1 says neurons form part of a communication network influencing how the body functions; option 2 says the nucleus is a control centre because it controls all metabolic activities in a cell; option 3 says motor or efferent neurons carry messages from the environment to the spinal cord and brain; option 4 says impulse conduction in a neuron is mainly made up of electrical and chemical processes.Show the full question

  2. Question 2 · The human nervous system · 2 marks

    Name the process whereby an impulse travels much faster by jumping from node to node as it passes through the myelin sheath.Show the full question

  3. Question 3 · The human nervous system · 2 marks

    Identify which neurotransmitter is linked to muscular rigidity and tremor.Show the full question

  4. Question 4 · The human nervous system · 2 marks

    When an electrical charge becomes strong enough to exceed the threshold, the resting membrane potential is transformed into what?Show the full question

  5. Question 5 · The human nervous system · 2 marks

    When an axon is insulated with a certain substance, it conducts impulses far more quickly than axons lacking this insulation. What is this substance?Show the full question

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