Final answer:
The anxiety triggered by aftershave is not the nervous system; it is a conditioned response, and it's false that the thymus gland releases norepinephrine. Allergies and autoimmune diseases are true examples of an overreactive immune system. So the correct answer is option (B).
Step-by-step explanation:
The statement that in the example of aftershave triggering anxiety, the anxiety is the NS (nervous system) is false. Anxiety in response to a stimulus like aftershave would represent a conditioned response, typically linked to classical conditioning rather than the nervous system itself. The nervous system is involved in the process of experiencing anxiety, where during stress, one preganglionic neuron can synapse with multiple postganglionic neurons, but the anxiety is not the nervous system itself.
Regarding the statement that the thymus gland releases norepinephrine during stress, this is also false. The adrenal medulla is responsible for releasing norepinephrine and epinephrine in response to stress, not the thymus gland. To address statement 14 about allergies and autoimmune diseases, it is true that they both result from an over-reactive immune system. Allergies are caused by the immune system reacting to harmless substances as if they are dangerous, while autoimmune diseases occur when the immune system mistakenly attacks healthy body cells.