Botany-Passive Transport Answers Essay

Substances necessary for normal growth and development of plants must continually be transported into carrells spot metabolic wastes must be eliminated so that they wont accumulate inside the cells. For instance, piddle as well as mineral salts from the soil solution enter root cells while atomic number 6 dioxide and oxygen through tiny pores known as stomata in leaves and lenticels in stem. Excess oxygen not utilized during cell respiration as well as oxygen produced during photosynthesis is released to the atmosphere. In most cases, movement of these substances is on a concentration gradient, that is, from regions of greater concentration to regions of less concentration. Such character of transport is known as passive transport.Diffusion is a pillow slip of transport which is concerned with the movement of solute particles. Aside from concentration gradient, factors affecting the locate of diffusion include the temperature, size of diffusing molecules and comportment of o ther molecules deflection from the diffusing one. Osmosis, on the other hand, is another type of passive transport, which is gnarly in the movement of solvent (e.g. pee) through a semi-permeable membrane. In osmosis, the presence of a differentially permeable membrane as well as differences in the concentration of the medium and the intracellular substance (i.e. cell sap) be factors to consider in determining the direction of irrigate flow. (madel, dito gawa k ng visuals na puede,.. kung aong maisip mo di ko nga alam kung ano puede ndin ilgay . Ano kaya gagamitin ntin? Naka-acetate oh sa manila paper kaw n bhala..) straight the walls of these cells are made of a stuff a bit manage a really fine netting that result let water through just now not salt (a partially permiable membrane). Now water and salt prefer being mixed together than seperated, and water will move through the cell wall towards whichever side is the saltiest, this is called osmosis.This means that because ri ght(prenominal) is saltier the water leaves the cells, so the cells empty, and corresponding a half full pop out of water, go all diskette so the whole lettuce hitch goes floppyNow if you put the leaf in fresh water there are more salts in the leaf than in the water, so water will move back into the cells making them blow up like balloons again and become all strong and rigid.So if you have just about old limp Lettuce soaking it in water for a while for a while will make it go crisp again.-The leaf in the salt water would be keepd, as its internal osmotic insisting would make water from the leaf seep through the cellular membranes. -its osmosis. the cells in the leaf are permeable to water but not salt,so if you immerse the leaf in salt water the cell will absorb water trying to balance the osmotic pressure .if you put the leaf in fresh water the cells will hoot water,the salt water will cause the cells to absorb too untold water and they will burst,the fresh water leaf wi ll dehydrate and wrinkle,i think i got it right but dont repeat me. -Your talking about tonicity, the salt solution is hypertonic and would pull peregrine from the plasmodesmata in the plant cellsthe plain water being relatively isotonic would have little loss of fluid depending on where you live in the country and if you used tap water or bottled. Its the same excogitation of cellular dehydration and water toxicity in human cells.