IV ESTUDO DIRIGIDO CIÊNCIAS 8º ANO
Autor: Susana Almeida | Publicado: 2011-03-30T13:45:00-07:00

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IV Estudo Dirigido- Ciências – 8º ANOObs.: -Responder as perguntas no Caderno de Ciências.-Apoio para estudo das questões Apostila Ciências Unidade 4.
1) Qual a definição de alimento? E quais as suas funções?
2) Qual a importância de uma equilibrada alimentação para o organismo? O que os alimentos nos fornecem?
3) Quais são os dois tipos de substâncias que faz parte da constituição e nutrição das nossas células?
4) Diferencie componentes orgânicos e os inorgânicos. Dê exemplos de alimentos que possui esses componentes.
5) Qual a importância da reposição das células em nosso organismo? O que possibilitar essa capacidade para as células?
6) De que forma deve ser feita a reposição de substâncias essências as nossas células? 
7) O que são nutrientes? O que ocorre com esses nutrientes em nosso organismo quando ingerimos?
8) O que é digestão, como ela ocorre? Qual a sua função, e importância?
9) Responda:
a) Como os nutrientes são classificados? b) Quais os tipos de nutrientes conforme a (função) que desempenham no organismo?c) Quanto à composição química (sua constituição) como os nutrientes sãoclassificados?&nbsp;&nbsp;10) Definir:
a) Nutrientes energéticos ou de combustão. Dê exemplos.b) Nutrientes construtores ou plásticos. Dê exemplos.c) Nutrientes reguladores. Dê exemplos.
11) Definir:a) Carboidratos. Quais os tipos de carboidratos, sua função. Dê exemplos de alimentos.b) Lipídios. Como são classificados, sua função. Dê exemplos de alimentos.
12) O que são proteínas. Quais são os tipos de proteínas quanto a sua origem. E quais são as suas funções no organismo. Dê exemplos de alimentos.
13) O que são vitaminas? Como são classificadas? Relacione as principais vitaminas encontradas nos alimentos.
14) O que são sais minerais? Quais são eles, as suas funções e importância? Onde são encontrados? Dê exemplos.
15) Quais as funções e importância da água no organismo humano? Explique. 
16) O que é desidratação? O que causa a desidratação?
17) Faça uma tabela organizada em colunas dos nutrientes: Carboidratos, Lipidios, Vitaminas, Sais minerias. Ao lado de cada nutriente, escreva os alimentos que possui a composição.
Bom estudo!!!Tia SusanaBjos