occu eleasing hormo Cehvercdltotne antea the parathyroid gland often result in s
ID: 3522199 • Letter: O
Question
occu eleasing hormo Cehvercdltotne antea the parathyroid gland often result in secretion of excess parathyroid hormone. Considering the of this hormone, predict the effects of such a tumor. How would the effects change if the tumor 16 secreted calcitonin instead? Srrorges, in vadius sus in loge at hyod ala A pheochromocytoma (fee-uh-kroh-muh-sy-TOH-muh) is a tumor of the adrenal medulla that secretes epinephrine and norepinephrine. Predict the symptoms that you might see from this condition. Endocrine System UNIT 16 443 odUNIT 20 549 loring Anatomy& Physiology in the LaboratoryExplanation / Answer
2. parathormone (PTH) is a hypercalcemic hormone, which increases the level of blood calcium by i) increasing bone resorption by osteoclasts. Ii) decreasing collagen synthesis by osteoblasts. Iii) increasing calcium uptake by kidney via its action on DCT. In case of hypersecretion due to a tumor in parathyroid, the bones become deformed due to excessive demineralization, leading to cavity formation.
Calcitonin acts antagonistic to parathormone, i.e, it decreases the level of calcium in blood plasma.
3. epinephrine and norepinephrine are catecholamines secreted by the adrenal gland. They are derived by modification of tyrosine amino acids. they raise blood glucose level and increase metabolic activities. They also function as a neurotransmitter in the nervous system.
It is called fight/flight hormone. These hormones are secreted in life-threatening conditions. Generally, they produce a rapid bioenergetic effect by increasing breakdown of glycogen in the liver and skeletal muscle. They also promote the release of glucose from liver cells and fatty acids from fat cells. these fatty acids and glucose can be used as energy source in the time of stress and thus these hormones help the body cope up in the time of short time stress. Epinephrine causes the dilation of bronchioles that increases the oxygenation of blood. It stimulates the heart and increases the rate of heartbeat. These hormones also change the blood supply to different organs. For example, they dilate the blood vessels of the heart, brain, and skeletal muscle while constricting the blood vessels of intestine, skin, and kidney.
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