Page 264 - Biology_F5
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Coordination and Irritability
Revision exercise 4
1. How does negative feedback 6. What role do the rods and cones
mechanism differ from positive play in the human eye?
feedback mechanism in hormonal 7. A group project on plant movements
coordination? is given by your biology teacher
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2. Assume that you are a “to describe the concepts of nastic
neuroscientist and you want to and tropic movements in plants”.
educate a group of pupils about Prepare a summary of your speech
the operations of the cell body and including real world examples.
myelin sheath. What functions do 8. Assess the effects of phytohormones
these anatomical structures provide on the growth and development of
in the neurological system? plants using specific examples to
3. Using relevant sketches, describe back up your claims.
how an impulse is transmitted 9. Outline the role of phytohormones
across the synapse. in plants.
4. Draw a well labelled diagram of 10. Explain the application of natural
the mammalian ear. and synthetic phytohormones in
5. How would you compare and crop production and weed control.
contrast the nervous and hormonal 11. Explain the role of synthetic
systems in performing day to day phytohormones in the development
activities? of industrialised Tanzania.
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