Help l text Arial ; Below is a skeletal muscle cell. It is surrounded by extrace

Question

Help l text Arial ; Below is a skeletal muscle cell. It is surrounded by extracellular fluid high in oxygen, which has come from blood pressure) of oxygen (in units of millimeters of mercury) in the cytoplasm and extracellular fl (ECF) are given. in a nearby capillary. The concentrations (measured as uid Use the drawing above to answer these questons: 13. Oxygen molecules will undergo net movement into the cell. Name the transport mechanism by which oxygen crosses the plasma membrane. 14. Is ATP required for this transport process to occur? Answer: YES or NO. Then, briefly justify your answer (provide information which supports your answer). Your justification is required for credit. 15. Consider only the oxygen levels present in the cytoplasm and ECF as shown in the drawing above (no new oxygen is entering the region, no oxygen is leaving). What will the concentration of oxygen in the cytoplasm be when equilibrium is reached? mm Hg

Explanation / Answer

Ans 13....oxygen is transported to cell across the plasma membrane by SIMPLE DIFFUSION method.it is a passive movement from high to low concentration

Ans 14...No, no ATP is required for this movement to occur because this movement is passive that is from high concentration to low concentration that is along the concentration gradient.

Ans 15...in this given condition at equilibrium the concentration or pressure of oxygen becomes equal in both cytoplasm and extracellular fluid.as we know the ecf oxygen has come through capillaries which has around 100 mm of Hg oxygen.at equilibrium 50 Hg is present in cytoplasm and 50 Hg is present in extracellular fluid.

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