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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?

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

Solution & Step-by-step Explanation

This is a classic "fight or flight" response. The sympathetic nervous system is activated, which stimulates the adrenal medulla to release emergency hormones—epinephrine (adrenaline) and norepinephrine (noradrenaline)—into the bloodstream to prepare the body for the emergency.

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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

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Human PhysiologyNeural ControlEndocrine SystemAdrenal Gland

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