1. In relation to homeostasis, explain why a person with toxic goiter tends to sweat profusely. 2. Explain how the action of a peptide hormone is similar to the action of the neurotransmitter norepinephrine.

In relation to homeostasis, explain why a person with toxic goiter tends to sweat profusely.

When there is hyper secretion of thyroid hormone in an individual a condition called  toxic goiter occurs.Here the goiter swells at the neck region.Although this may pose no potential risk, but it maybe cancerous.

Thyroid hormones(T3,T4),increases calorinogenesis,that is they are carlorinogenic(,generate it in the body).This increases the oxygen consumption of the heart, and therefore overall body temperature.

To  control the body temperature, the body thermo regulatory mechanisms set in, as the blood convey the heat to the thermo receptors  in the hypothalamus. Vasodilation (widening of blood capillaries) occurs as the hypothalamus control the body temperature.

Therefore, as the heat leaves the body, through the capillaries close the the   skin  surfaces,the body need to produce sweat  to conveyed the heat  which cools the body temperature,hence sweating .

2. Explain how the action of a peptide hormone is similar to the action of the neurotransmitter norepinephrine.

 This is because norepinephrine.  act as  hormones when secreted by   Adrenal gland directly into the blood streams and as neurotransmitter when produced  from the CNS and sympathetic nervous system.

Generally,from transcription by the DNA, peptide hormone are transcribed  by the mRNA,and the protein is translated  into corresponding proteins by the tRNA.And from this exhibited their dominant effects on the endocrine systems.

Generally,  norepinephrine. is specific in mode of actions.It binds to  specific receptor at the cell surfaces  to produce it effects. Likewise  peptide hormones are also receptor specific binding. Thus these are the similarities

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