Question

Symptoms of a disease related to the nervous system are given below.
(a) Tremor due to irregular and involuntary movement of muscles.
(b) Uncontrolled flow of saliva.
(c) Loss of balance of the body.
i. Identify this disease and write down its name.
ii. What is the cause of this disease?

Answer 1

i. These are symptoms of Parkinson's disease.

ii. The deficiency of the neurotransmitter dopamine causes this disease.

This disease is characterized by the breakdown of certain nerve cells in the brain. When dopamine levels decrease there is abnormal brain activity leading to Parkinson's disease.