Which of the following are examples of amplification of a hormone signal?
I. Epinephrine initiates an enzyme cascade.
II. Steroids bind hormone- response elements in the cell and initiate the transcription of many genes.
III. A quantity of 0.09 mg of growth hormone leads to a 10 000- mg weight gain in a cow.
IV. Different cell types have different receptors capable of binding the same hormone.

Question

Quizplus · Accepted Answer

I: Epinephrine binding to a receptor on the surface of a cell initiates a cascade of enzyme activation which amplifies the original signal. 
II: Steroids binding to hormone-response elements in the nucleus can initiate the transcription of many genes, amplifying the hormonal signal. 
III: This is not a typical example of hormonal signaling or amplification. 
IV: Different cell types expressing different receptors for the same hormone increases the potential for amplification of the hormonal signal.

Which of the Following Are Examples of Amplification of a Hormone