An aged man had raise of arterial pressure under a stress. It was caused by activation of:

Answer options

1. Functions of thyroid gland
2. Sympathoadrenal system
3. Hypophysis function
4. Parasympathetic nucleus of vagus
5. Functions of adrenal cortex

Explanation

Within the brain, reception of a signal for a stressor by the hypothalamus leads to an increase in activity of the sympathoadrenal system, essentially within the nerves that send signals to the adrenal glands.