C. Channel proteins bind to molecules too large to diffuse into or out of the cell, and allow them to pass.
Hormonal regulation of hormone release involves a hormone binding to its receptor on an endocrine cell to regulate hormonal secretion. A hormone that regulates hormone secretion is called a tropic hormone. Tropic hormones may also stimulate proliferation of endocrine cells.
Net Primary Productivity ... the amount of biomass present in an ecosystem at a particular time .... Explain why a slow growing forest can have a very low NPP and yet store a massive amount of biomass.
I think this is True.
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