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A person entering an emty room suddenly ...

A person entering an emty room suddenly finds a snake right in fornt 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, medulla

B

Neurotransmitters diffuse rapidly across the cleft and transmit a nerve impulse

C

Hypothalamus activates the parasymphathetic division of brain

D

Sympathetic nervous system is activated releasing epinephrine and norepinephrine from adrenal cortex

Text Solution

Verified by Experts

The correct Answer is:
A
Epinephrine and norepinephrine 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).
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ARIHANT NEET-NEURAL CONTROL AND COORDINATION -CHAPTER EXERCISES MEDICAL ENTRANCES GALLERY
  1. The human hind brain comparises three parts, one of which is

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  2. Which part of the human ear plays no role in hearing as such but is ot...

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  3. A person entering an emty room suddenly finds a snake right in fornt o...

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  4. Which part of human brain is concerned with the regulation of body tem...

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  5. Dark adaption in human eye involves

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  6. The optic lobes in humans are represented by the corpora

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  7. Pigment lodopsin in contained in

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  8. Vagus nerve is a

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  9. The number of spinal nerves in human is

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  10. Third and fourth ventricles of brain are connected by

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  11. string synaptic transmission of nerve impulse, neurotransmitter (p) is...

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  12. The purplish red pigment rhodopsin contained in the rods type of photo...

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  13. When a neuron is in resting state i.e. not conducting any impulse, the...

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  14. Pneumotaxic centre which can moderate the functions of the respiratory...

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  15. The electrical potential diference between outside and inside of a ner...

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  16. Read the given statements and select the correct option. (i)Synaptic...

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  17. The order of the three layers of cells in the retina of human eye from...

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  18. The tract of nerve fibres which connects the cerebral hemisphere is

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  19. Medulla oblongata develops from

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  20. Respiratory control centre is

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