{"id":377,"date":"2017-10-23T20:19:54","date_gmt":"2017-10-23T20:19:54","guid":{"rendered":"https:\/\/courses.lumenlearning.com\/sunynutrition\/?post_type=chapter&p=377"},"modified":"2017-11-13T19:07:38","modified_gmt":"2017-11-13T19:07:38","slug":"4-6-protein-uptake-absorption-transport-liver-uptake","status":"publish","type":"chapter","link":"https:\/\/courses.lumenlearning.com\/suny-nutrition\/chapter\/4-6-protein-uptake-absorption-transport-liver-uptake\/","title":{"raw":"4.6 Protein Uptake, Absorption, Transport & Liver Uptake","rendered":"4.6 Protein Uptake, Absorption, Transport & Liver Uptake"},"content":{"raw":"
\r\n\r\nThere are a number of similarities between carbohydrate and protein uptake, absorption, transport, and uptake by the liver. Hopefully after this section you will understand these similarities.\r\n\r\nOver 60% of all amino acids are taken up into the enterocyte as di- and tripeptides through the PepT1 transporter. Individual amino acids are taken up through a variety of amino acid transporters. Once inside the enterocyte, peptidases cleave the peptides to individual amino acids. These cleaved amino acids, along with those that were taken up as individual amino acids, are moved into the capillary by another variety of amino acid transporters (some are the same as on the brush border, some are different).\r\n
\r\n\r\n[caption id=\"\" align=\"aligncenter\" width=\"1135\"]\"\" Figure 4.61 Protein uptake and absorption[\/caption]\r\n\r\n<\/div>\r\nThe capillary inside a villus is shown below.\r\n
\r\n\r\n[caption id=\"\" align=\"aligncenter\" width=\"323\"]\"\" Figure 4.62 Anatomy of a villus1<\/sup>[\/caption]\r\n\r\n<\/div>\r\nLike monosaccharides, amino acids are transported directly to the liver through the portal vein.\r\n
\r\n\r\n[caption id=\"\" align=\"aligncenter\" width=\"826\"]\"\" Figure 4.63 The portal vein transports monosaccharides and amino acids to the liver2<\/sup>[\/caption]\r\n\r\n<\/div>\r\nAmino acids are taken up into the hepatocyte through a variety of amino acid transporters. The amino acids can then be used to either make proteins or are broken down to produce glucose, as will be described in chapter 6.\r\n
\r\n\r\n[caption id=\"\" align=\"aligncenter\" width=\"1118\"]\"\" Figure 4.64 Hepatic amino acid uptake[\/caption]\r\n\r\n<\/div>\r\n

References & Links<\/h3>\r\n\r\n1. http:\/\/en.wikipedia.org\/wiki\/File:Intestinal_villus_simplified.svg\r\n\r\n2. https:\/\/commons.wikimedia.org\/wiki\/File:Gray591.png\r\n\r\n

Videos<\/h3>\r\n\r\nAbsorption in the Small Intestine - http:\/\/www.youtube.com\/watch?v=P1sDOJM65Bc\r\n\r\n<\/div>","rendered":"
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There are a number of similarities between carbohydrate and protein uptake, absorption, transport, and uptake by the liver. Hopefully after this section you will understand these similarities.<\/p>\n

Over 60% of all amino acids are taken up into the enterocyte as di- and tripeptides through the PepT1 transporter. Individual amino acids are taken up through a variety of amino acid transporters. Once inside the enterocyte, peptidases cleave the peptides to individual amino acids. These cleaved amino acids, along with those that were taken up as individual amino acids, are moved into the capillary by another variety of amino acid transporters (some are the same as on the brush border, some are different).<\/p>\n

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Figure 4.61 Protein uptake and absorption<\/p>\n<\/div>\n<\/div>\n

The capillary inside a villus is shown below.<\/p>\n

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Figure 4.62 Anatomy of a villus1<\/sup><\/p>\n<\/div>\n<\/div>\n

Like monosaccharides, amino acids are transported directly to the liver through the portal vein.<\/p>\n

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Figure 4.63 The portal vein transports monosaccharides and amino acids to the liver2<\/sup><\/p>\n<\/div>\n<\/div>\n

Amino acids are taken up into the hepatocyte through a variety of amino acid transporters. The amino acids can then be used to either make proteins or are broken down to produce glucose, as will be described in chapter 6.<\/p>\n

\n
\"\"<\/p>\n

Figure 4.64 Hepatic amino acid uptake<\/p>\n<\/div>\n<\/div>\n

References & Links<\/h3>\n

1. http:\/\/en.wikipedia.org\/wiki\/File:Intestinal_villus_simplified.svg<\/p>\n

2. https:\/\/commons.wikimedia.org\/wiki\/File:Gray591.png<\/p>\n

Videos<\/h3>\n

Absorption in the Small Intestine – http:\/\/www.youtube.com\/watch?v=P1sDOJM65Bc<\/p>\n<\/div>\n\n\t\t\t

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Candela Citations<\/h3>\n\t\t\t\t\t
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