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Carrier ions like Na+ facilitate the absorption of substances like
- a)Amino acids and glucose
- b)Glucose and fatty acids
- c)Fatty acids and glycerol
- d)Fructose and some amino acids
Correct answer is option 'A'. Can you explain this answer?
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Carrier ions likeNa+facilitate the absorption of substanceslikea)Amino...
Most ions are actively absorbed along the length of small intestine. The absorption of Na+ is coupled with absorption of glucose and amino acids. Glucose and galactose are taken into the enterocyte by cotransport with sodium using the same transporter. Fructose enters the cell from the intestinal lumen via facilitated diffusion through another transporter. Fatty acids are combined with proteins within the cells and resulting chylomicrons are extruded. They enter lacteals and are transported to the circulation via lymph.
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Carrier ions likeNa+facilitate the absorption of substanceslikea)Amino...
Carrier ions like Na facilitate the absorption of substances like amino acids and glucose because:
1. Role of carrier proteins: Carrier proteins are involved in the transport of many substances across the cell membrane. These proteins bind to specific molecules and transport them across the membrane by changing their conformation.
2. Importance of carrier ions: Carrier ions like Na play an important role in facilitating the uptake of certain substances. For example, the uptake of glucose and amino acids in the small intestine is facilitated by the presence of Na ions.
3. Sodium-glucose cotransporters: Sodium-glucose cotransporters (SGLTs) are carrier proteins that transport glucose across the cell membrane. These transporters require the presence of Na ions to function properly. Na ions bind to the transporter protein and create a gradient that drives the transport of glucose into the cell.
4. Sodium-amino acid transporters: Similarly, sodium-amino acid transporters (SATTs) are carrier proteins that transport amino acids across the cell membrane. These transporters also require the presence of Na ions to function properly. Na ions bind to the transporter protein and create a gradient that drives the transport of amino acids into the cell.
5. Importance of absorption: Absorption of nutrients like glucose and amino acids is essential for the proper functioning of the body. Glucose is the primary source of energy for the body, while amino acids are used for protein synthesis and other important metabolic processes.
6. Implications for health: Impairment of the absorption of glucose and amino acids can lead to a variety of health problems. For example, impaired glucose absorption can lead to diabetes, while impaired amino acid absorption can lead to malnutrition and other metabolic disorders.
In conclusion, carrier ions like Na play an important role in the absorption of substances like amino acids and glucose. This process is facilitated by carrier proteins like SGLTs and SATTs, which require the presence of Na ions to function properly. Proper absorption of these nutrients is essential for the proper functioning of the body and overall health.
1. Role of carrier proteins: Carrier proteins are involved in the transport of many substances across the cell membrane. These proteins bind to specific molecules and transport them across the membrane by changing their conformation.
2. Importance of carrier ions: Carrier ions like Na play an important role in facilitating the uptake of certain substances. For example, the uptake of glucose and amino acids in the small intestine is facilitated by the presence of Na ions.
3. Sodium-glucose cotransporters: Sodium-glucose cotransporters (SGLTs) are carrier proteins that transport glucose across the cell membrane. These transporters require the presence of Na ions to function properly. Na ions bind to the transporter protein and create a gradient that drives the transport of glucose into the cell.
4. Sodium-amino acid transporters: Similarly, sodium-amino acid transporters (SATTs) are carrier proteins that transport amino acids across the cell membrane. These transporters also require the presence of Na ions to function properly. Na ions bind to the transporter protein and create a gradient that drives the transport of amino acids into the cell.
5. Importance of absorption: Absorption of nutrients like glucose and amino acids is essential for the proper functioning of the body. Glucose is the primary source of energy for the body, while amino acids are used for protein synthesis and other important metabolic processes.
6. Implications for health: Impairment of the absorption of glucose and amino acids can lead to a variety of health problems. For example, impaired glucose absorption can lead to diabetes, while impaired amino acid absorption can lead to malnutrition and other metabolic disorders.
In conclusion, carrier ions like Na play an important role in the absorption of substances like amino acids and glucose. This process is facilitated by carrier proteins like SGLTs and SATTs, which require the presence of Na ions to function properly. Proper absorption of these nutrients is essential for the proper functioning of the body and overall health.
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