The Stages of Molecules in a Cell Essay

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1. A. Passive transport is when molecule travels from a higher concentration to a lower concentration down a concentration gradient whereas active transport is when molecule travels from a region of lower concentration to a region of higher concentration against the concentration gradient. Passive transport does not require energy whereas active transport requires energy in order for substances to pass through it. (Marieb & Hoehn, 2007). B. Active Transport: Active Diffusion: Passive Endocytosis: Active Osmosis: Passive Filtration: Passive Facilitated Diffusion: Passive Secondary Active Transport: Active Exocytosis:Active C. Substances need to cross the cell membrane to be able to get in and out of…show more content…
Lastly, carrier proteins affect whether a molecule will be able to pass through a biological membrane. Carrier proteins are used if a molecule is too large to pass through channels. If there are many carriers, then not only the process will be quick but it will also allow more molecules to come in. 4. Osmosis is basically a phenomenon of movement of water through a permeable membrane when the water concentration is different between the slides. (Brandis). B. Osmolality is number of solute or concentration of particles in per kilogram of solution. It is expressed in terms of weight. (Brandis). 5. In Isotonic, the concentration gradient is the same inside and outside the body whereas in hypotonic the concentration gradient inside the body is less than the one outside and in hypertonic, the concentration gradient inside the body is greater than the one outside. (Marieb & Hoehn, 2007). 6. Ringer’s solution would be isotonic solution. IV is used when a patient loses blood. this Solution would be given so that the concentration gradient gets same inside and outside of the body and so that there could not be any net change in the cell shape. (Nicole, 2012). 7. Crenate is shrinking of cell due to loss of water, it occurs in hypertonic solution. Lyse is burst of cell due to excessive amount of water in the cell, and it happens in hypotonic solution. (Marieb & Hoehn, 2007). 8. A. Glucose-
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