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Structural, physiological or behavioural features that assist an organism to survive in a particular habitat. |
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| Neurons that transmit information about changes in external or internal conditions to the central nervous system. Also called sensory neurons |
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| Hormone which increases reabsorption of water into the blood from the distal tubules and collecting ducts of nephrons in the kidney. |
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| Compound that when added to a fluid lowers the freezing point of the fluid |
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| Extension of a nerve cell along which impulses are transmitted away from that cell. |
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| Part of the neuron that contains the nucleus. |
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| The part of the nervous system that is comprised of the brain and spinal cord. |
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| Transfer of heat between two materials that are in direct contact with each other. e.g body and air. |
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| also called interneurons, type of nerve cell, located in the CNS, that links sensory and effector neurons. |
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| Convection, air currents, carry the heat away from the body and more heat is lost, if the air is moving. |
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| Arrangement of vascular tissues that enable heat to be transferred from a vessel carrying fluid from the core to an extremity, to a vessel carrying fluid from an extremity to the core. |
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| Waxy outer layer on a leaf. |
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| Branched extensions of nerve cells that transmit impulses to that cell. |
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| Organism whose body temperature is governed by external sources of heat |
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| Neurons which transmit information from the central nervous system to muscle cells or glands. Also called motor neurons. |
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| Sytstem of ductuless glands that produce hormones which are released directly into the bloodstream. |
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| Organisms whose body temperature is maintained by internal metabloic sources |
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| The condition of a relativelt stable internal environment maintained within narrow limits. |
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| Organism that is able to maintain an internal body temperature within a narrow range. Endothermic. |
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| In animals, chemicals produced in endocrine glands that are released into and transported via that bloodstream to other parts of the body where they act. |
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| Region of the brain responsible for essential fuctions associated with the autonomic nervous system. |
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| Feedback that tends to stabilize a process or conditions by reducing its rate or output when its effects are too great. |
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| Specialised cells found within the hypothalamus that are able to detect minute changes in solute concentrations of bodily fluids. |
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| The maintenance of constant internal salt and water concentrations in internal fluids. |
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| A term that describes the diffusion of water across a semi-permeable membrane from a region of lowe solute concentration to a region of high solute concentration. |
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| Endocrine attached to the hypothalamus. Influences the production of thyroxine by the thyroid gland. |
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| Organims whose body temperature varies with the external environment. Ectothermic. |
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| Extent of variation in an environmental factor within which a species can survive. |
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| Loss of water from the surfaces of a plant. |
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| Plants with characteristics that enable resistance to drought and life in very arid areas. |
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| hormone released by the kidney that acts to increase water reabsorption from nephron tubules. |
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