Exchange of materials - key words 4.0 / 5 based on 1 rating ? BiologyExchange of materialsGCSEAQA Created by: MrwaddlewaddleCreated on: 31-01-16 15:26 Osmosis The net movement of water from an area of high concentration to low concentration along a concentration gradient 1 of 28 Partially Permeable Allowing only certain substances to pass through 2 of 28 Active Transport The movement of substances against a concentration gradient and/or across a cell membrane, using energy 3 of 28 Dehydrated lacking in water 4 of 28 Rehydrated To restore water to a system 5 of 28 Isotonic Having the same concentration of solutes as another solution 6 of 28 Exchange surface A surface where materials are exchanged 7 of 28 Solute The solid which dissolves in a solvent to form a solution 8 of 28 Gaseous Exchange The exchange of gases 9 of 28 Alveoli The tiny air sacs in the lungs which increase the surface area for gaseous exchange 10 of 28 Ventilated The movement of air into and out of the lungs 11 of 28 Capillary The smallest blood vessle that runs between individual cells. It has a wall that is only one cell thick 12 of 28 Breathing System The organ system involved in breathing: the ribs, intercostal muscles, diaphragm, the lungs and tubes which bring air into the body 13 of 28 Diaphragm A strong sheet of muscle that separates the thorax from the digestive organs, used to change the volume of the chest during ventilation of the lungs 14 of 28 Abdomen The lower region of the body 15 of 28 Breathe The physical movement of air into and out of the lungs 16 of 28 Intercoastal Muscles The muscles between the ribs which raise and lower them during breathing movements 17 of 28 Domed A curved, dome shape 18 of 28 Vacuum An area with little or no gas pressure 19 of 28 Negative Pressure A system when the external pressure is lower than the internal pressure 20 of 28 Positive Pressure A system where the external pressure is higher than the internal pressure 21 of 28 Trachea The main tube lined with cartilage rings which carries air from the nose and mouth down towards the lungs 22 of 28 Villus A finger like projection from the lining of the small intestine which increases the surface area for the absorbtion of digested food into the blood 23 of 28 Evaporation The change of a liquid to a vapour at a temperature below its boiling point 24 of 28 Root hair cell Cell on the root of a plant with microscopic hairs which increases the surface area for the absorbtion of water from the soil 25 of 28 Transpiration Stream The movement of water through a plant from the roots to the leaves as a result of the loss of water by evaporation from the surface of the leaves 26 of 28 Guard cells The cells which surround stomata in the leaves of a plant and control their opening and closing 27 of 28 Wilting The process by which plants droop when they are short of water or too hot. This reduces water loss and prevents cell damage 28 of 28
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