Saturday, October 31, 2009

Plz define the following terms for me . itz important & ergent!?

1, thermoregulation
2,homeostasis
3,evaporation
4,convection
5,negative feedback model ...
so help me out ppl . i thank you.
Answer:
Thermoregulation - it is a way to regulate temperature inside and out the body.Homeostasis - method of making internal environment equal to outside environment and vice versa.Evaporation - transformation of liquid state to gaseous state.Convection - it is a form of energy/heat release going out of the body. ( sponge bath principle )Negative feed back model - this one is difficult to discuss but i'll give you an example
On a condition where there is decrease thyroid hormones (T3%26T4) in the blood( hypothyroidism ).The hypothalamus secretes Thyroid stimulating hormone(TSH) and send an impulse to pituitary gland to secrete
Thyroid realeasing hormone(TRH)The TRH stimulate the Thyroid gland to realease T3, T4With accumulation of T3 %26 T4 in the blood: they will send a NEGATIVE feedback to the hypothalamus to stop the secretion of TSH.THIS IS THE NEGATIVE FEEDBACK MODEL EXAMPLE:I can discuss the thermoregulation negative feedback, but it is very technical and confusing. You better look for it on the book to understand.
What's wrong with googling them yourself or using a dictionary?

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