Question

A person entering an empty room suddenly finds a snake in front. What happens to his neurohormonal control system?
A. The sympathetic nervous system gets activated releasing epinephrine and norepinephrine from the adrenal medulla.
B. Activation of the sympathetic nervous system releasing epinephrine and norepinephrine from the adrenal cortex.
C. Neurotransmitters diffuse rapidly across synaptic clefts.
D. Hypothalamus activates the parasympathetic nervous system.

Answer 1

Most of our activities in our daily life are either occur voluntarily or involuntary, where the involuntary actions are generally carried out by the autonomous nervous system, which controls the specific body process and this is of again 2 types, they are parasympathetic and sympathetic and they both have specific actions.

Complete answer:
When a person suddenly gets the fear by seeing anything or by any sudden situation, a person obtains some stress, and in those sudden stressful conditions in humans activates the sympathetic nervous system of the body.
Where this sympathetic nervous system gives signals to the adrenal gland.
Adrenal glands are cap-shaped glands that are present on the top of kidneys, and these glands undergo regression in their size, as age increases.
This gland has two parts, such as cortex and medulla, where the cortex releases the corticosteroids, and the Medulla of the gland releases the two hormones, they are Adrenaline and noradrenaline.
And this adrenaline is the hormone that is released by the body whenever there is a stressful situation and this is called a fight or flight hormone, and it is mainly released by the sympathetic activation.
It is also known as an emergency hormone, where it makes the person to escape or to fight that situation.
And some changes happen during the secretion of adrenaline are an increase in the heart rate and increase in the circulation of blood, and it increases the circulation of blood to the brain.
In this condition oxygen supply to muscles increases, and there is the occurrence of gluconeogenesis, which increases blood glucose level.

So, the correct option is A.

Note: Any sudden stress in the body activates the sympathetic system, which in turn gives the signals to the adrenal medulla to release the adrenaline that is fight or flight hormone, which helps the person to have immediate action against the emergency.