7.7B/7.13AB Homeostasis+Organism Force/Motio
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| STIMULUS | Action or condition that provokes a response.
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| RESPONSE | Change in a system resulting from a stimulus.
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| HOMEOSTASIS | Tendency of an organism or cell to maintain a balanced state so as to maintain health and function.
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| PATHOGEN | Microorganism or virus that can cause disease.
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| FIGHT-OR-FLIGHT | Short-term physiological changes in response to stress that prepare the body for intense activity to avoid harm.
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| TROPISM | Turning or bending movement of living organisms toward or away from an external stimulus, such as light, gravity, touch, water, etc.
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| PHOTOTROPISM | Response of a plant to grow toward or away from light.
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| GRAVITROPISM/ GEOTROPISM | Plant’s growth in response to the force exerted upon it by gravity.
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| FORCE | Push or pull that can change the motion of an object.
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| MOTION | Change in an object's position with respect to time & in comparison to the position of other objects used as reference points.
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| GERMINATION | Process by which a plant grows from a seed, a.k.a. seedling emergence.
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| VACUOLE | Organelle in cell cytoplasm; functions to store water, nutrients, & wastes; 1 large central unit in plant cells, several small units in animal cells.
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| TURGOR PRESSURE | Force of water molecules against the cell wall that allows plants to stand up straight; "turg = swollen."
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| TROPISM | Turning of all or part of an organism in a particular direction in response to an external stimulus, e.g. gravity, light, water, touch, heat, etc.
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| PHOTOTROPISM | Orientation of a plant or other organism in response to light, either toward or away from the source of light; "photo = light."
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| HYDROTROPISM | Growth or turning of plant roots toward or away from moisture; "hydro = water."
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| GEOTROPISM/ GRAVITROPISM | Plant’s growth in response to the force exerted upon it by gravity; "geo = earth" & "gravi = gravity."
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| WILT | Become limp or droopy due to heat, loss of water, or disease.
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| TURGID | State of plant cells when their vacuoles are filled with water, causing the plant leaves to stand upright; "turg = swollen."
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| BLOOD | Liquid that circulates through the body carrying nutrients, oxygen, & waste products.
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| HEART | Muscular organ that pumps blood through the circulatory system.
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| BLOOD VESSELS | Structures that carry blood through the tissues & organs in a body; veins & arteries.
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| CIRCULATION | Movement around something, especially that of fluid in a closed system; "circ = ring."
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| BLOOD PRESSURE | Pressure of blood in the circulatory system; measured for diagnosis due to close relation to the force & rate of the heartbeat.
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