Question

Compare and contrast hydrophilic and hydrophobic messengers in terms of the three main steps of indirect signaling

Answer 1

Answer:

Hydrophobic messengers diffuse readily across cell membranes, because they are soluble in membrane lipids. However, because they are insoluble in aqueous solutions, they are typically transported bound to carrier proteins in the blood. At the target cell, they can bind to extracellular receptors, or diffuse across the cell membrane and bind to intracellular receptors. Hydrophilic messengers are released from the signaling cell via exocytosis because their low solubility in lipids means that they cannot diffuse across the membrane. They travel dissolved in the blood, because they are readily soluble in aqueous solutions. At the target cell, they cannot cross the cell membrane and instead must bind with membrane receptors on the target cell to stimulate a Response.

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Answer 2

Hydrophobic and hydrophilic substances are those which have solubility either in lipid or water.

Explanation:

• In case of the hydrophobic substances the substances are soluble in lipid but are insoluble in water or aqueous solution and as a result of this they can penetrate into the cell membrane because cell membrane is lipid in nature.

• But hydrophobic substances require Transportation by different mediators for entry into the cell. Hence it is energy dependent process.

To know more about the hydrobhopic substances,

Discuss-Hydrophobic, Hydrophilic substances.(Minimum 2 pages ...

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