Membrane Transport STIONS 5-6: Refer to the diagram on the right to answer the s

Question

Membrane Transport STIONS 5-6: Refer to the diagram on the right to answer the stions. Outside the cell (extracellular fluid Inside the cell stances X and Y may be any substances other than water. Letter e indicates relative concentrations of substances X and Y on ch side of the membrane. Therefore, the concentrations of X and are greater inside the cell than outside. The solute concentrations f the extracellular fluid and cytoplasm are measured in nilliosmols (mOsm). The membrane is permeable to water Solute concentration: 500 mOsm Solute concentration 300 mOsm Plasma membrane lipid bilayer) the membrane in the direction of the green arrow, and substance Y crosses the membrane in the direction of the 5. Substance X crosses ransported activelyt Explain blue arrow. Which substance is being transported passively and which is being t h direction? Explain 6. Given the conditions illustrated in the diagram, the net flow of water across the membrane will be in whic red blood cells when they are exposed to isotonic, hypotonic, and hypertonic solutions exposed to isotonic, hypotonic, and h water. Match each figure with the type of solution surrounding the cell. below, illustrate the effects on red blood cells when they are directional flow of (bl la) The arrows represent the net di

Explanation / Answer

Question 5.

Substance X(green arrow ) is having passive transport as it is traveling from a region of high concentration to the region of low concentration

Substance Y(Blue arrow) is having active transport as it is traveling from a region of low concentration to the region of high concentration.

Question 6.

Water would move outside the cell because the net solute concentration outside the cell is more than inside the cell(500mOsm vs 300mOsm) . in other words the concentration of water outside the cell is less than what is inside the cell. hence, by osmosis, the water would move outside the cell.

Question 7

a- isotonic

b-hypotonic

c-hypertonic

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