and vinegar the egg was larger after remaining in the water. This is because the distilled water expands the shell. Water not only expands the shell of a egg‚ but it is also used to sprinkle fresh vegetables at markets. This is because water is hypotonic to the plant cells. Water has fewer solutes and a higher concentration of water than the inside of the plant cells. Causing more water to diffuse into the plant cells than the amount of water that diffuses out of the cells. More water inside the
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BIOLOGY – TRANSPORT ACROSS MEMBRANE define diffusion and describe its role in nutrient uptake and gaseous exchange in plants and humans define osmosis and describe the effects of osmosis on plant and animal tissues define active transport and discuss its importance as an energy-consuming process by which substances are transported against a concentration gradient‚ as in ion uptake by root hairs and uptake of glucose by cells in the villi . A cell is surrounded by a layer of cell surface membrane
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(i.e. the medium is a hypotonic solution) surrounding the cell then osmosis will result in the cell gaining water. The water molecules are free to pass across the cell membrane in both directions‚ but more water molecules will enter the cell than will diffuse out with the result that water enters the cell‚ which will then swell up and could possibly burst. 2. If the water concentration inside the cell is the same as that in the surrounding medium (i.e. the medium is a isotonic solution) there will
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1. Identification of Some Macromolecules 1) What are 2 types of treatment controls‚ and explain each. Positive control: gives positive result if experimental conditions were followed correctly Negative control: gives negative result if experimental conditions were followed correctly 2) What are the most abundant elements in living material? Carbon‚ Hydrogen‚ Oxygen‚ Nitrogen‚ Sulfur and Phosphorus 3) What are the 4 major biological macromolecules? Carbohydrates (monosaccharides &
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1) Homeostasis is the condition in which the body maintains a. changing state‚ within an unlimited range. b. an equilibrium point that can change over a narrow range that is compatible with maintaining life c. an equilibrium change that balances external and internal environment such that values of each are equated 2) Anabolism is the a. breakdown of matter. b. expulsion of matter. c. synthesis of matter. d. All of the answers are correct. 3) The sum
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Chapter 5 Assignment 1. What is energy? What are the three forms of energy? Energy is the capacity to do work. There are four types of energy according to the powerpoint. They are Kinetic energy (energy of motion)‚ potential energy (stored energy)‚ thermal energy (heat)‚ and chemical energy (potential energy of molecules). 2. State the First and Second Laws of Thermodynamics. Include entropy in your explanation. The first law states that energy can neither be created nor destroyed it can
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water from one area to another that are separated by a selectively permeable membrane to equalize concentrations of particles in the two locations (Lang‚ 1997). Osmosis is able to maintain osmotic pressure and regulate a cell’s volume. In a hypotonic () or hypertonic () environment‚ a cell may be liable to gain or lose water. Osmotic pressure is known as the amount of force needed to prevent the flow of water through a membrane. Osmotic pressure allows a cell to prevent itself from shrinking or swelling
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function in another column. e. What type of molecules make up the plasma membrane f. Know what the difference is between: diffusion‚ osmosis‚ active transport‚ passive transport‚ exocytosis and endocytosis g. Tonicity: Cells in hypertonic‚ hypotonic and isotonic solutions. What happens to the cells? Chapter 4 Know the different types of tissue: epithelial‚ connective (fibrous‚ bone‚ cartilage and blood)‚ muscle‚ and nerve. Where are each of these tissue found and what function do they perform
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Continuing to stay in the sun will worsen Mark’s sunburns. Henry should also start administering Mark on diluted fluids that contain essential electrolytes. This will help restore hydration to Mark’s body without running the risk of his plasma becoming hypotonic. Mark has lost a lot of water through sweat and this combined with the intense heat of the sun has caused Mark to have heat stroke. The heat stroke and severe water loss is causing Mark to feel weak‚ nauseous‚ disoriented‚ have low blood pressure
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molecules are randomly distributed throughout an object‚ with all areas having an equal concentration.For this particular investigation I think that the lower the concentration of the salt solution in the test tube‚ the larger the increase in mass of the potato chip will be. This is because the water molecules pass from a high concentration. Therefore‚ I believe that the chips that are in the tubes containing a higher concentration of water than salt will have a larger mass than chips in tubes with higher
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