Liver cells are in contact with the blood and exchange a variety of substances with the blood plasma (the noncellular part of blood). The concentration of water is equal in the cytoplasm of liver cells and in the blood plasma. Explain this observation in terms of membrane permeability and transport mechanisms.Animal cells typically maintain a higher concentration of Na+ outside the cell and a higher concentration of K+ inside the cell via the Na+-K+ pump. The drug ouabain inhibits the activity of the Na+-K+ pump. A nerve cell is incubated in ouabain. Predict what will happen to the concentrations of Na+ and K+ inside and outside the nerve cell as a result.

Answered: Liver cells are in contact with the…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Liver cells are in contact with the blood and exchange a variety of substances with the blood plasma (the noncellular part of blood). The concentration of water is equal in the cytoplasm of liver cells and in the blood plasma. Explain this observation in terms of membrane permeability and transport mechanisms.
Animal cells typically maintain a higher concentration of Na⁺ outside the cell and a higher concentration of K⁺ inside the cell via the Na⁺-K⁺ pump. The drug ouabain inhibits the activity of the Na⁺-K⁺ pump. A nerve cell is incubated in ouabain. Predict what will happen to the concentrations of Na⁺ and K⁺ inside and outside the nerve cell as a result.

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Plasma membrane is not permeable to all molecules. charge molecules are not permeable to plasma membrane that is why it need pump or transporters to transport large and charge molecule.

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