Nervoussystem - Nervous System 1989 Paper 2 Question 5 5(a...

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Chapter 12 / Exercise 6
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Nervous System1989 Paper 2 Question 51989 Paper 2 Question 55.(a)Outline the sequence of neural events that brings about the responses and sensations in a barefooted person who unintentionally steps on a sharp-pointed nail.(10 marks)(b)"A coordinating system comprises five basic components : stimulus, receptor (or sensor), controller (or integrating centre), effector and response." Discuss this statement with reference to a named example of nervous coordination and a named example of hormonal coordination.(6 marks)(c)Explain TWOfunctional differences between the nervous and hormonal coordinating systems.(4 marks)Ans1990 Paper 2 Question 41990 Paper 2 Question 44.(a)Describe the differences between the properties of the membrane in the excited and resting regions of a neurone.(2 marks)(b)(i)Briefly describe the nature of nerve impulse conduction along a nerve fibre and outline the mechanism.(ii)How do the structural characteristics of neurones affect the conduction speed of a nerve impulse ?(7 marks)(c)Describe and explain the process of synaptic transmission.(5 marks)(d)Contrast the functions of the cerebrum and the spinal cord.(6 marks)
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Blueprint Reading for Welders
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Chapter 12 / Exercise 6
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Ans1996 Paper 1 Question 51996 Paper 1 Question 55.Draw a fully-labelled diagram of a synapse in the process of neurotransmission.(5 marks)Ans1997 Paper 1 Question 41997 Paper 1 Question 44.The following figure illustrates the changes in the membrane potential of an axon during the production of an action potential :(a)Describe the events occurring along the membrane of the axon during periods M and N.(4marks)(b)Account for the unidirectional conduction of nervous impulses along the axon.(1 mark)
Ans1998 Paper 2 Question 11998 Paper 2 Question 11.A man voluntarily bends his right arm.(a)Describe the neural pathway involved. (5 marks)(b)Describe the response of the muscles concerned in bringing about such a bending movement. Use a schematic diagram to illustrate the sliding mechanism.(10 marks)(c)What are the roles played by the various components of the elbow joint during such a movement ?(5 marks)AnsSolution
1989 Paper 2 Question 51989 Paper 2 Question 5 SolutionSolution5.

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