<span>cell, tissue, organs, organ system</span>
Answer:
a trophic cascade
Explanation:
A trophic cascade -
It refers to the process where the addition or removal of any of the predators disturbs the food chain , is referred to as a trophic cascade .
As the reduction in one of the animal of the food cycle would lead to the increases in the number of his food , which would be the plant or the animal .
Hence , from the given scenario of the question ,
The correct answer is a trophic cascade .
200 different types of cells are in the human body
D-walls and doors would represent the cell membrane
<span> They are unable to pass through the plasma membrane and have different methods of action. They attach to their receptors in the target cell surface and influence activity within the cell through cytoplasmic intermediates called second messengers. </span>
<span>The two most important messengers are cAMP and inositol triphosphate. </span>
<span>Cyclic AMP: ATP is converted into cAMP after a series of reactions on the plasma membrane following the attachment of the hormone to the membrane. cAMP relays the signal from the membrane to the metabolic machinery of the cytoplasm. </span>
<span>Inositol Triphosphate: Involves the use of Ca+2 that regulates cellular protein activity.
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Hope this helps !!!^_~!!!