Aerobic Respiration Breaking down glucose to release energy Products are Carbon dioxide and water Diffusion is … the movement of molecules from a region of high concentration to a low concentration until the concentration is equal. Role of a human circulatory system: Diffuse In – oxygen (O2)‚ dissolved food (glucose) and water (H2O) Diffuse Out – carbon dioxide (CO2)‚waste and water(H2O) Respiration – releasing energy in cells Breathing – getting air into and out of your body
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-How plants get liquid and minerals- Flowers absorb liquid through their roots‚ which are attached to xylem vessels. Xylem vessels are tubes that can expand through several feet of tissue and be .7mm in diameter. Their walls are thickened with cellulose deposits. Xylem bring water up to the leaves and petals of the plant. Even without contact with the roots‚ the xylem can still absorb water. Because of this‚ a cut flower usually doesn’t die for a couple days (as long as it is placed in water of
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b) Vibro cholera c) Trypanosoma d) Gonococcus sp (3) The odontoid process is associated with a) Atlas b) axis c) sacrum d) scapula (4) All the following are cells of the Xylem tissue of plants except a) Companion cells b) Vessels c) Tracheids d) Parenchyma (5) Muscles are attached to bones by means of a) Ligament b) cartilage c)
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The process of osmosis and its importance to living organisms Osmosis is the process by which there is a net movement of water through a semi permeable membrane from an area of high water potential to an area of low water potential. Within a cell‚ osmosis has the following effect. If the water potential of the cell is lower than that around the cell water will move across a concentration gradient into the cell. If this is the case‚ the increase in water in the cell‚ may cause the cell to swell
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in the nucleus that determine the atomic number of the element and the number of electrons can carry. Neutrons are neutral particles with no charge that are found in the nucleus. Plants Xylem tubes can be up to 1 metre in length. Xylems give support‚ strength and rigidity to the stem. Water that enters the xylem in the roots is transported upwards through the stem to the leaves‚ which is a process also known as transpiration. The phloem transport sugars to the whole of the plant. Sugars are made
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Practical 1 - Investigation into size and scale of microscopic tissues This practical focuses on microscope technique and using graticules and stage micrometers to determine size and scale in biological cells and tissues. Intended learning outcomes By the end of this practical you should be able to: • Use a microscope fitted with an eyepiece graticule and stage micrometer • Calibrate the eyepiece graticule using the stage micrometer • Use the calibrated graticule to determine the actual
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Translocation A. The Munch pressure flow model The Principal of Pressure-Flow Model of Phloem Transport The Münch pressure-flow model is an explanation for the movement of organic materials in phloem .By the Münch pressure-flow experiment‚ two dialysis tubings are connected by a glass tube. The dialysis tubings only permeable to water or particles which have smaller size than the pores of the tubing‚but impermeable to the larger solutes.As larger molecules such as proteins and polysaccharides(starch)
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water dilutes the solution in the cytoplasm‚ so the solution is less concentrated than that of cells closer to the centre of the root. Water therefore passes from cell to cell by osmosis across the root‚ until it reaches the xylem vessel at the centre of the root. The xylem vessel carries water up the plant. Plants need minerals to stay healthy. Minerals are found dissolved in the soil water around the plant roots. When minerals dissolve‚ they form ions. These are very small and can pass through
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(waterproof walls and dead at maturity) › Ground tissue system – 3 ground tissues: parenchyma‚ sclerenchyma and collenchyma • Complex permanent tissues – vascular system. › Vascular system – transport materials like water‚ minerals‚ sugar etc › Xylem – conducts water and minerals from roots of leaves 2 conducting cells: vessel elements & tracheids. › Phloem – transport glucose to leaves of the roots (Sieve tube cells) *Epidermis – outermost cell layer that covers the leaves‚ stems etc
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differences of water potential with the adjacent cell will cause water to move from the adjacent cell into the mesophyll cell which then established a water potential gradient in the plant. The water potential gradient will cause water to flow from the xylem along a chain of cells to the outermost mesophyll cell. Since‚ the experiment was dealing with rising the temperature of the plant’s surrounding air‚ water in the plant will have a greater tendency to evaporate and diffuses out into the atmosphere
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