Q2 of 44 Page 113

Do you think body’s team work maintains the functioning of our body? Justify your answer with an example. (AS1)

The human body has several organs. These organs cannot perform their functions independently. So each organ depends on other organs. In order to maintain normal physiology, functions of these organs must be coordinated so that they can work in proper manner. Coordination is the process through which two or more organs interact and complement the functions of each other. Integration is the process which makes two or more organs to work as a functional unit in harmony. The neural system involves control and Coordination of various body functions through neurons.

For example, the neural system and the endocrine system jointly coordinate and integrate functions of various body parts to maintain normal physiology. The neural system provides an organized network of nerve fibers which connect various organs fir quick neural coordination. The endocrine system provides chemical integration through hormones.


More from this chapter

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1

Fill in the missing sections in the following flow chart. (AS1)

 3

Give an example of coordination in your body where both hormonal and nervous control function together. (AS1)

 4

Consider that you are passing by a garbage disposal area and you immediately cover your nose. Arrange the events below in a logical order by marking them from 1 to 5 to trace the events that happen in the nervous system from detection of foul smell (stimulus generation) to covering your nose (response). (AS1)

A. At the end of the axon, electrical impulse releases chemicals


B. Stimulus received by the dendrites of a neuron sets off a chemical reaction that creates an electrical impulse.


C. Electrical impulse transmitted through cell body and axon


D. The chemicals cross the synapse and reach the next neuron. Similarly, the electrical impulse crosses several neurons


E. Finally, the impulse is delivered from neuron to the gland that helps in recognition of the foul smell and muscle cells that help in covering the nose

 5

What is a synapse? How is it useful in transfer information? (AS1)