Formative Practice 12.5 (Form 4 Biology Textbook Exercise and Answer)

Question 1:
State the symptoms of Alzheimer’s disease.

The patient forgets easily and loses his/her sense of direction even in familiar places. If the brain degeneration continues, he/she will lose the ability to read, write, eat, walk and speak.

Question 2:
Explain how drugs affect the coordination of one’s nerves.

Drugs speed up or slow down impulse transmission at the synapse by obstructing the action of substances that transmit synapse.

Question 3:
Why do doctors use drugs in the treatment of cancer patients who undergo chemotherapy?

To reduce nausea and pain of the patient

Question 4:
Explain why a drunk individual is not allowed to drive a vehicle.

Alcohol impairs the brain’s ability to estimate distance while driving, and to coordinate.

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