Name C# BIL 150 Workshop II MEMBRANE Solutes (ions, nutrients) have to move acro

Question

Name C# BIL 150 Workshop II MEMBRANE Solutes (ions, nutrients) have to move across the membrane, and this can happen in a variety of different ways. When we ignore bulk transport, there are three main ways. Two of these are passive and require no energy. One is active. List two of them below and indicate which gradient. one requires energy and which ones do not. Also indicate whether or not the solute moves up or down its transport mechanism Diffusion energy required? gradient Now imagine three particles (A, B & C), and each one crosses into a cell by a different transport mechanism. (I can't tell you which one for each particle, because it will give too much away. So we'll just call them A, B & C.) Plotted below are the rates of transport for the three different particles. You need to think about this carefully. It might be confusing if you try to rush through it. The lines below depict the rates of movement from the outside of a cell to the inside of a cell. The X-axis indicates the difference in solute concentration between the outside of the cell and the inside of the cell. So when X is 0, there is no difference in concentration across the membrane. When X is positive, the outside of the cell has greater concentration of solute; when X is negative the inside of the cell has a greater concentration. The lines indicate, for the three different particles, how quickly the particle is entering the cell at any combination of internal and external solute concentrations. So if you look where the letter B is in the figure, at that solute concentration difference (which is positive, meaning there is a greater concentration of solute outside the cell), particle A is moving more quickly into the cell than is particle B. Particle C is also moving into the cell, but at an even lower rate. Transport of Molecules into Cells 2 Soluten> 0 4 6 8 Solute out [Solute] (Solute,ut-Sol uteJ

Explanation / Answer

Cell membran is semipermeable that allow transport of some ion and restrict the entry of other. Solute move from one side to another by different transport mechanism, two major mechanisms are passive and active transport. passive transport include facilitated diffusion and diffusion and active transport include primary and secondary active transport. Facilitated diffusion occur with the help of carrier protein.

1. Diffusion require no energy move down the concentration gradient means high to low concentration

2. facilated diffusion no energy move down the concentration gradient

3. active transport energy move up the concentration gradient means low to high concentration

Ans 4) Partical A = active transport

according to graph , for partical A , X axis is negative means solute concentraion inside the cell higher than the outside. Therefore, solute move from lower (outside) to higher concentration (inside) means against the concentration graient. this process require energy that make this reaction faster as compare to other passive mechanisms.

Ans 5) Partical B = facilitated diffusion

Partical B has lower concentration inside and higher concentration outside means molecule move down the concentration gradient means high to low concentration. graph pattern depicts that it is a facilitated diffusion. its rate is faster than simple diffusion because involve carrier protein.

Ans 6) Partical C = simple diffusion

this partical has lowest speed of movement and move from heigher to low concentration also form straight line on the graph a characterstic feature of simple diffusion.

Ans 7) Simple treatment of cholera is provide rehydration because people lost electrolyte and water during this disease so oral rehydration salt that replace lost fluid and electrolyte for rehydration of patient and prevent so many death.

Ans 12) glucose 6 phosphatase reaction help in homeostatic regulation of blood glucose level. if you skip your lunch, blood glucose level become low then gluconeogenesis started in liver that produce glucose to increase blood glucose level that is utilize by cells. Therefore, glucose 6 phosphatase increase blood glucose level when its level become low in order to maintain it.

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