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Questions and Answers
What is the function of a cell membrane?
Which method of transport requires energy to move molecules against a concentration gradient?
What is the process of passive transport of water across a membrane called?
What is the movement of solute molecules from an area of high concentration to an area of low concentration called?
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Which type of transport uses proteins to carry polar molecules or ions across the membrane?
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What type of solution has a higher concentration of water (H2O) compared to another solution?
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What is the main function of a selectively permeable membrane?
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What is the term for movement of water molecules across a semipermeable membrane until equilibrium is established?
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In which type of solution does a higher concentration of solute exist, leading to a lower water gradient?
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What process removes waste products and extra fluid from blood by filtering them through a membrane, similar to the way healthy kidneys would?
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Which term refers to a solution with a lower concentration of solute than another, creating a higher water gradient?
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What is the term for the process where small waste products and toxins flow through a membrane by diffusion into a special fluid during dialysis?
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What happens to water molecules in an isotonic solution?
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What is the term for movement of substances across a membrane without the use of energy?
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which of the following is not a function of cell membrane?
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Study Notes
Functions and Uses of Diffusion and Osmosis
- Functions of cell membranes: protection, control of substances in and out, maintenance of ion concentrations, selectively permeable
- Methods of transport across membranes: diffusion, osmosis, facilitated diffusion, active transport
- Diffusion: movement of solute from higher to lower concentration, un-facilitated and passive
- Osmosis: diffusion of solvent (water) through a membrane following its gradient, movement from high to low concentration, un-facilitated and passive
- Tonicity: relative term for hypotonic, hypertonic, and isotonic solutions
- Uses of diffusion and osmosis: dialysis removes waste products and extra fluid from blood by filtering through a membrane
- Dialysis process: blood on one side of the membrane, special fluid (dialysate) on the other, waste products flow through the membrane by diffusion
- Dialysate composition: water, electrolytes, and minerals
- End goal of dialysis: simulating the way healthy kidneys remove waste from the blood
- Specifics of dialysis: small waste products and toxins in the blood flow through the membrane into the dialysate
- Application of diffusion and osmosis in dialysis: mimicking the natural process of kidney function
- Kidney function simulation: dialysis filters blood through a membrane, allowing waste products and toxins to flow out by diffusion
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Description
Test your knowledge on the functions of cell membranes and the methods of transport across membranes including diffusion, osmosis, and facilitated diffusion.
