SUGESTÃO RESPOSTAS AA1 - 24/04 BIO MAGRAO
Autor: Prof. Magrão | Publicado: 2015-04-24T11:29:00-03:00



1. &nbsp;

a) O excesso de
colesterol no sangue pode provocar o aparecimento de placas de gordura que
obstruem as artérias, causando acidentes celulares graves. Pode-se reduzir o
colesterol circulante por meio da redução da ingestão de alimentos ricos em
gordura animal.

b) Formar os sais
biliares que emulsificam as gorduras da dieta, reduzindo-as a gotículas
microscópicas. Dessa forma, eles funcionam como um “detergente” natural,
facilitando a digestão dessas gorduras pelas enzimas lípases da digestão.
Outras funções: formar vitamina D, hormônios sexuais, remover radicais livre e
participar da estrutura esquelética das membranas celulares.

c) cerca de 75% é originado no
fígado, os 25% restantes são obtidos na dieta.









&nbsp;&nbsp;

2.
&nbsp;

a) &nbsp;Carne e feijão

b) Fe2+.
A forma Fe2+ é encontrada nas carnes e vísceras. O gráfico mostra
que esse alimento contém a forma iônica do ferro melhor absorvida pelo
intestino humano.

c) Sim. A laranja
é rica em vitamina C. Essa vitamina auxilia a conversão do Fe3+ em
Fe2+, melhorando a absorção do íon pelo intestino humano. 









3.&nbsp;&nbsp; 

a) Uso imediato - glicose, porque é monossacarídeo e é absorvida sem
sofrer digestão. Uso tardio - amido, porque é polissacarídeo e precisa ser
digerido.

b) Neurônios são células que obtém energia para seu metabolismo através
da respiração celular. O papel da glicose nesse processo é fundamental, pois é
a fonte mais importante que fornece energia ao metabolismo celular.
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