Reflex Action

As you know, the previous Section A questions are about experiments done, stating hypothesis, identifying variables etc., Section B questions are depend on your knowledge about the theories learned. So, if you didn't focus in your lessons, you'll be in TROUBLE!

The next part of this entry is one example....

a) Name P, Q and R in the boxes provided in Diagram 4.

    Namakan P, Q dan R dalam kotak yang disediakan dalam Rajah 4 .

[3 marks ]

[3 markah]

Note: PLEASE..... observe the diagram carefully! Students always being so careless in observing diagram..

Answer:
P : Sensory neuron               Q : Motor neuron              R : Muscle

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b) What happens to R when the student accidentally touches the burning candle?

     Apakah yang akan berlaku pada R apabila pelajar tersentuh lilin bernyala itu?

[1mark]

[l markah]

Answer:
Contracts

Note: You don't have to write long sentence, just one word is enough.. This is to eliminate grammar mistakes.

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c) (i) What type of action is involved in (b).

         Apakah jenis tindakan yang terlibat dalam (b)

[1mark]

[1markah]

Answer:
Reflex action


(ii) Which part of the central nervous system controls the action in (c) (i)?

     Bahagian manakah dalam sistem saraf pusat yang mengawal tindakan dalam (c ) (i)?

[1mark]

[1markah]

Answer:
Spinal cord

Note: Reflex action does not involve thinking... So, it does not involve brain

Good Luck!