PATHOLOGY MCQ
ENDOCRINE SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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produces a hormone (melatonin) that helps you go to sleep
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produces a hormone that stimulates the immune response
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produces a hormone that increases blood
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produces a hormone that deceases bone calcium levels
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Detailed explanation-1: -Melatonin is a hormone secreted by the enigmatic pineal gland in response to darkness, hence the name hormone of darkness. It has generated a great deal of interest as a therapeutic modality for various diseases particularly sleep disorders.
Detailed explanation-2: -Melatonin is produced by various tissues in the body, although the major source is the pineal gland in the brain. Melatonin (blue) is produced naturally from the amino acid tryptophan, by the pineal gland (purple) at night-time.
Detailed explanation-3: -It is a pinecone-shaped small gland located in the middle of the human brain in between the two hemispheres in an area called epithalamus. It was once known as “the third eye”. It is the major site for melatonin secretion, which regulates the body’s internal clock (Circadian rhythm).