Our understanding of mental illness has been most advanced by discoveries involving the ________.
A) degree of convolutions in the brain's surface
B) sequence of developmental specialisation
C) chemicals involved in brain communications
D) nature of the blood-brain barrier

Question

Quizplus · Accepted Answer

The discovery of chemicals involved in brain communications, such as neurotransmitters and their receptors, has greatly advanced our understanding of mental illness. Imbalances in these chemicals have been linked to various mental health conditions.

Answer: A
 While the degree of convolutions in the brain's surface (known as gyri and sulci) can provide insights into brain structure and function, it has not been the primary focus of research into mental illness.

Answer: B
 This statement is unclear and vague. It is not clear what is meant by "sequence of developmental specialisation", so it is not possible to say whether this has contributed to our understanding of mental illness.

Answer: D
 While the blood-brain barrier plays an important role in protecting the brain from harmful substances, it has not been a major focus of research into mental illness.

Our Understanding of Mental Illness Has Been Most Advanced by Discoveries