A person entering an empty room suddenly finds a snake right in front on opening the door. Which one of the…

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 neurohormonal control system?
  1. Sympathetic nervous system is activated releasing epinephrine and norepinephrine from adrenal medulla
  2. Neurotransmitters diffuse rapidly across the cleft and transmit a nerve impulse
  3. Hypothalamus activates the parasympathetic division of brain
  4. Sympathetic nervous system is activated releasing epinephrine and norepinephrine from adrenal cortex

Solution

Epinephrine and nor-epinephrine are secreted by adrenal medulla (under the control of sympathetic nervous system) in response to stress of any kind or during emergency situations. These are also called emergency hormones or hormones of flight, fight and fright (triple F hormone).

Asked in: NEET 2012 (Screening)

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