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Q: What word describes any chemical that affects the body's structure or function? Read this paragraph and choose the correct option from the provided answers: A drug is any chemical that affects the body's structure or function. Many drugs, including both legal and illegal drugs, are psychoactive drugs . This means that they affect the central nervous system, generally by influencing the transmission of nerve impulses. For example, some psychoactive drugs mimic neurotransmitters. At the link below, you can watch an animation showing how psychoactive drugs affect the brain. http://www. thirteen. org/closetohome/animation/neuron-main. html. Choices: - treatment - toxin - gift - drug A:
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drug

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Q: What includes all living things within all their environments, including everywhere life exists, from the upper atmosphere, to the top of the soil, to ocean bottoms? Read this paragraph and choose the correct option from the provided answers: The biosphere includes all living things within all of their environments. It includes every part of the environment where life exists, from the upper reaches of the atmosphere to the top few meters of soil, to the bottoms of the oceans. An ecosystem is made up of the relationships among smaller groups of organisms with each other, and with their environment. Scientists often speak of the interrelatedness of living things, because, according to evolutionary theory, organisms adapt to their environment, and they must also adapt to other organisms in that environment. Choices: - biome - community - habitat - biosphere A:
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biosphere

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Q: Which cells continue the digestion and absorption of nutrients and transport these nutrients to the lymphatic and circulatory systems? Read this paragraph and choose the correct option from the provided answers: Watch this animation (http://openstaxcollege. org/l/sintestine) that depicts the structure of the small intestine, and, in particular, the villi. Epithelial cells continue the digestion and absorption of nutrients and transport these nutrients to the lymphatic and circulatory systems. In the small intestine, the products of food digestion are absorbed by different structures in the villi. Which structure absorbs and transports fats?. Choices: - myocyte - blood cells - neurons - epithelial cells A:
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epithelial cells