Consider the following statements about the biological model of abnormal behaviour:
(A) A tiny space called synapse separates one neuron from the next.
(B) When an electrical impulse reaches a neuron's ending, the nerve ending is stimulated to release a chemical called a hormone.
(C) Psychological disorders are often related to problems in the transmission of messages from one neuron to another.
(D) Abnormal activity by certain neuro-transmitters can lead to specific psychological disorders.
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → A, C and D only
(A) A tiny space called synapse separates one neuron from the next. — Correct. A synapse is the tiny gap between two neurons. A message must cross this space to pass from one neuron to the next.
(B) When an electrical impulse reaches a neuron's ending, the nerve ending is stimulated to release a chemical called a hormone. — Incorrect. The nerve ending releases a neuro-transmitter. Hormones come from endocrine glands and travel in the blood.
(C) Psychological disorders are often related to problems in the transmission of messages from one neuron to another. — Correct. Biological researchers have found that many disorders are tied to problems in passing messages between neurons.
(D) Abnormal activity by certain neuro-transmitters can lead to specific psychological disorders. — Correct. Abnormal activity of certain neuro-transmitters can lead to specific disorders, for example low serotonin activity in depression.
NCERT (2026-27): “FACTORS UNDERLYING ABNORMAL BEHAVIOUR … |