Botany-Passive Transport Answers Essay Example for Free

Botany-Passive Transport Answers EssaySubstances necessary for ruler growth and development of plants must continu all(prenominal)y be transported into cells charm metabolic wastes must be eliminated so that they wont accumulate inside the cells. For instance, pee as well as mineral flavors from the change solution enter root cells while carbon dioxide and oxygen through and 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 spunks is along a assimilation gradient, that is, from regions of greater concentration to regions of less concentration. Such case of transport is known as resistless transport.Diffusion is a type of transport which is concerned with the movement of solute particles. Aside from concentration gradient, factors affecting the rate of diffusion include the temperature, sizi ng of diffusing molecules and presence of other molecules aside from the diffusing one. Osmosis, on the other hand, is another type of passive transport, which is involved in the movement of solvent (e.g. piddle) 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) are factors to consider in determining the direction of wet 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..)Now the walls of these cells are made of a gourmandize a bit like a really fine netting that pull up stakes let water through but not salt (a partially permiable membrane). Now water and salt prefer beingness mixed together than seperated, and water will move through the cell wall towards whichever side is the saltiest, this is c alled osmosis.This room that because outside is saltier the water leaves the cells, so the cells empty, and like a half full bag of water, go all floppy so the whole lettuce toss goes floppyNow if you put the hitch in saucy 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 unanimous and rigid.So if you have some 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 dehydrated, as its internal osmotic pressure 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 dump water,the salt water will cause the cells to absorb too much water and they will burst,the fresh water leaf will dehydrate and wrinkle,i think i got it right but dont quote me. -Your talking about tonicity, the salt solution is hypertonic and would pull fluid 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 utilise tap water or bottled. Its the same concept of cellular dehydration and water toxicity in human cells.