Chemical Coordination and Regulation Question 81
81. Parkinson’s disease (characterized by tremors and progressive rigidity of limbs) is caused by degeneration of brain neurons that are involved in movement control and make use of neurotransmitter
(a) acetylcholine
(b) norepinephrine
(c) dopamine
(d) GABA
Show Answer
Answer : c
Hints & Solutions
(c) Parkinson’s disease (Paralysis agitans) (i) It develops due to deficiency of neuro transmitter, dopamine. The dopamine is not produced due to gradual destruction of neurons in the substantia nigra. (ii) It produces muscle tremors so called shaking palsy. (iii) There is lack of control and coordination of movements resulting in expression less face and stooping posture which gradually produces physical disability.
