Question

A person entering an empty room suddenly finds a snake right in front on opening the door. Which one of the following is likely to happen in his neuro-hormonal control system?

• A. Sympathetic nervous system is activated releasing epinephrine and norepinephrine from adrenal cortex
• B. Sympathetic nervous system is activated releasing epinephrine and norepinephrine from adrenal medulla
• C. Neurotransmitters diffuse rapidly across the cleft and transmit a nerve impulse
• D. Hypothalamus activates the parasympathetic division of brain

Answer 1

The correct option is B Sympathetic nervous system is activated releasing epinephrine and norepinephrine from adrenal medulla

The adrenal medulla secretes two hormones called adrenaline or epinephrine and noradrenaline or norepinephrine. These are commonly called as catecholamine's. Adrenaline and noradrenaline are rapidly secreted in response to stress of any kind and during emergency situations and are called emergency hormones or hormones of fight or flight. Sympathetic nervous system is a part of nervous system that helps in release of epinephrine and norepinephrine from adrenal medulla.