At the cells of the target organ, the hormone acts as a "first or extracellular messenger", binding to a specific receptor site for that hormone on the plasma membrane. The…
LIFE WITHIN A SINGLE PLASMA MEMBRANE Protozoa have unicellular (cytoplasmic) organization. But they are not simple organisms. Often, they are more complex than any particular cell in higher organisms. Some…
greater than it inside. Filtration Hydrostatic pressure forces small molecules across selectively permeable membranes from areas of higher pressure to areas of lower pressure. A frog's blood …
The plasma membrane surrounds the cell. Chemically plasma membrane is composed of: Protein: 60 to 80% Phospholipids: 20 to 40 % Cholesterol in small amount Carbohydrates in small amount Fig:…
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