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Internal and External 7 13 AB.notebook October 23, 2015 7.13 A,B External & Internal Stimuli Internal and External 7 13 AB.notebook October 23, 2015 Internal and External 7 13 AB.notebook October 23, 2015 Your body likes to stay in balance (homeostasis). When you are out of balance your body's systems will work together to bring you back into balance. Internal and External 7 13 AB.notebook October 23, 2015 External Stimuli occurs outside the organism Stimulus Response when it's hot outside go in or seek shade What's a common RESPONSE? feeling cold in class put on a jacket; What's a common RESPONSE? seeing a spider scream:), run away What's a common RESPONSE? Bright outside squint/close eyes What's a common RESPONSE? What's a common RESPONSE? see something gross cringe; gag see stranger danger run away, hide What's a common RESPONSE? Internal Stimuli occurs from INSIDE organism itself (Ex. fever, vomiting, watery eyes, sneeze, wilting plant) Stimulus Response get a virus What's a common RESPONSE? fever, vomiting eat rotten food What's a common RESPONSE? stomach cramps What's a common RESPONSE? body dehydrated What's a common RESPONSE? not enough sleep What's a common RESPONSE? plant not watered less growth, wilting What's a common RESPONSE? vomiting, diarrhea pain, less activity thirst tired Internal and External 7 13 AB.notebook October 23, 2015 Living organisms are able to maintain a constant internal balance using processes to adjust to stimuli in the environment. All of the following are examples of internal processes used by living organisms to maintain balance except 7.13 B A the fluid in the inner ear canals detecting sensations of movement B the pupil of the eye shrinking in bright light, and getting larger in dim light C sweating when body temperature rises D turning on a fan Answer: D Which of the following is NOT correct 7.12 D about the cytoplasm within cells? A It helps dissolve cellular wastes. B It appears as a gellike liquid water surrounding the organelles in the cell. C It holds components that help move materials around the cell. D It is only found in animal cells. Answer: D Internal and External 7 13 AB.notebook October 23, 2015 A scavenger eats a diseased, rotting 7.13 B animal. After eating the animal, the scavenger feels sick and nauseated. This feeling of nausea is an — A external stimulus telling the scavenger to eat only plants in the future. B external stimulus telling the scavenger to never eat diseased animals again. C internal stimulus telling the scavenger to tolerate the sick feelings. D internal stimulus telling the scavenger to get rid of food that is dangerous for it. Answer: D Click here to play