Compare and contrast receptor recognition between a hydrophobic and hydrophilic hormone
What will be an ideal response?
Hydrophobic hormones are typically lipid soluble hormones--steroids or fatty acid derivatives. These
will diffuse into the cell and bind to intracellular receptors. Typical action of these hormones is to
affect gene activity. Hydrophilic hormones are non-lipid soluble and thus cannot easily enter the cell.
Receptors are typically membrane bound. The binding of the hormone to the receptor results in
activation of a type of second messenger, which then causes a variety of effects from permeability
changes to changes in enzyme activity.
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Which of the following nutrients is responsible for eutrophication in the Gulf of Mexico?
A. nitrogen B. phosphorous C. carbon D. oxygen E. water
Synthetic auxins are used as
a. pesticides. b. herbicides. c. fungicides. d. insecticides. e. all of these.
Humans exploit land organisms to a far greater degree than marine organisms.
Answer the following statement true (T) or false (F)
The pH of human blood is between a narrow range of 7.35 and 7.45. If a person's blood pH goes below 7.35 or above 7.45, the body counteracts changes in pH by releasing chemical buffers. This process of buffering changes in pH exemplifies which definition of life?
What will be an ideal response?