1. The first is movement through a semi-permeable membrane. 2. The third is thro
ID: 269497 • Letter: 1
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1. The first is movement through a semi-permeable membrane. 2. The third is through a semi-solid (agarose) medium, and finally through a living membrane. 3. Finally through a living membrane. My question is written hypotheses for each above( 3 total) can you guy please help me. 1. The first is movement through a semi-permeable membrane. 2. The third is through a semi-solid (agarose) medium, and finally through a living membrane. 3. Finally through a living membrane. My question is written hypotheses for each above( 3 total) can you guy please help me. 2. The third is through a semi-solid (agarose) medium, and finally through a living membrane. 3. Finally through a living membrane. My question is written hypotheses for each above( 3 total) can you guy please help me.Explanation / Answer
The hypotheses for various events can be found as below:
Answer 1: When two solutions are separated by a semi-permeable membrane, they experience osmotic pressure upon the membrane due to presence of large amount of solute molecules on one side. In order to minimize this pressure, movement of solvent takes place from the region of high solvent amount to the region of low solvent amount until equilibrium is reached.
Answer 2: When a molecule passes through a semi-solid medium such as agarose gel, the molecular size and complexity of the molecule contributes to the force which prevents its easy passage through the agarose. Larger molecules pass slowly through the gel whereas smaller molecules easily pass out through it. Similarly, small molecules pass through a living membrane either by receptor-mediated endocytosis or simple diffusion across the bilayer of phoshpolipids.
Answer 3: When a ligand/molecule proximates the plasma membrane, it is either internalized by the cell using specific cell-membrane receptors or by traversing through the membrane-spanning transport protein channels. These proteinaceous structures help in transport of material across a living membrane both, along or across the concentration gradient.
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