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4.2.1 Calculate the percentage decrease in the total number of children admitted to the hospital between 1998 and 2002. Give your answer to the nearest whole number. (show your working) …………………………………………………… % (3)

4.2.2 Health workers in the communities near the hospital were trained in the prevention and treatment of diarrhoea. This affected the total number of children being admitted to the hospital. Use the data in Table 4.1 to suggest the year in which the training took place. Give a reason for your answer. (2)

39.    The most rapid “saltitory” propagation or “hopping” of an action potential (“nerve impulse”) down an axon occurs only in what type of neurons? a.    myelinated type A and non-myelinated type C neuronsb.    unmyelinated and myelinated type A and B neuronsc.    type C neurons onlyd.    type B neurons onlye.    myelinated type A neurons only  

1.    Name the connective tissue coverings of a skeletal muscle, from superficial to deep? a.    endomysium . . . perimysium . . . epimysiumb.    endomysium . . . epimysium . . . perimysiumc.    perimysium . . . epimysium . . . endomysiumd.    epimysium . . . endomysium . . . perimysiume.    epimysium . . . perimysium . . . endomysium  

27.    What SM division of the nervous system controls voluntary contractions of the skeletal muscles? a.    sympathetic division of the autonomic nervous system (VM)b.    parasympathetic division of the autonomic nervous system (VM)c.    visceral motor division nervous system (VM)d.    somatic sensory division of the peripheral nervous system (SS)e.    somatic motor division of the peripheral nervous system (SM)  

29. Substances within nerve cells that are abnormally transported backwards from an axonal terminal to the cell body of the same neuron, are delivered by? a.    anterograde or normal flowb.    reverse flowc.    axoplasmic transportd.    retrograde flowe.    b and d

3.  What are the I bands of the sarcomere primarily composed of? a.    thick & thin filamentsb.    thick filaments containing myosinc.    thin filaments containing actin & troponind.    mysoin & troponine.    actin & mysoin

8.  What tunnel shaped part of the skeletal muscle cell carries action potentials (nerve impulses)      from the cell  membrane, to the sarcoplasmic reticulum? a.    sarcoplasmab.    sarcolemmac.    sarcomered.    t-tubules or transverse tubulese.    myoneural junction

9.  Based on the choices below, what is the correct order of events that occurs in muscle      contraction? a.    pivoting heads, ATP caused detachment, relaxation, attachment cross bridgingb.    ATP caused detachment, pivoting heads, attachment cross bridging, relaxationc.    attachment cross bridging, pivoting heads, ATP caused detachment, relaxationd.    attachment cross bridging, pivoting heads, relaxation, ATP caused detachmente.    pivoting heads,  attachment cross bridging, relaxation, ATP caused detachment  

5.  An action potential and ion transfer can travel quickly from one cardiac muscle cell to another      because of the presence of? a.    desmosomes & gap junctionsb.    fast fibers & desmosomesc.    tight junctions & intercalated discsd.    gap junctions & intercalated discs e.    hemidesmosomes & intercalated discs