A) SA node
B) \[\beta \]-cells of Langerhans
C) dorsal root of spinal cord
D) epithelial cells of stomach
Correct Answer: A
Solution :
The hormone adrenaline (epinephrine) is secreted by adrenal medula. This was the first hormone to be isolated in crystalline form. This hormone is primarily responsible for the alarming reactions. It increases the heart rate, breathing blood glucose level.
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