A person entering an empty room suddenly finds a snake right in front of him.Which one of the following is likely to happen in his neurohormonal control system?
Correct answer: A. The sympathetic nervous system is activated releasing epinephrine and norepinephrine from the adrenal medulla
- A. The sympathetic nervous system is activated releasing epinephrine and norepinephrine from the adrenal medulla
- B. Neurotransmitters diffuse rapidly across the cleft and transmit a nerve impulse.
- C. Hypothalamus activates the parasympathetic division of brain
- D. Sympathetic nervous system is activated releasing epinephrine and norepinephrine from the adrenal cortex.
Explanation
Hormones epinephrine and norepinephrine are secreted from the adrenal medulla. They are emergency hormones released in conditions of stress, emergency, etc. Epinephrine and norepinephrine are also released by adrenergic nerve fibres of the sympathetic nervous system, where they act as neurotransmitters.
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About Chemical Coordination and Hormones
Chemical coordination uses hormones released by endocrine glands and carried in blood to specific target cells. Coverage includes the pituitary, thyroid, pancreas, adrenal glands, ovaries and testes, feedback control, and the contrast between slower, longer-lasting hormonal responses and rapid nervous coordination.
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