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Carrier ions like $Na^+$ facilitate the absorption of substances like
A
Fructose and some amino acids
B
Amino acids and glucose
C
Glucose and fatty acids
D
Fatty acids and glycerol
Detailed Solution
Absorption in the intestine takes place by passive, facilitated and active transport.
The NCERT text on which this question is based states that substances like fructose and some amino acids are absorbed with the help of carrier ions like $Na^+$, a mechanism called facilitated transport.
Fatty acids and glycerol are insoluble in water; they are incorporated into micelles, re-formed into chylomicrons in the mucosal cells and passed into the lacteals, without the help of $Na^+$.
Hence carrier ions like $Na^+$ facilitate the absorption of fructose and some amino acids.
The NCERT text on which this question is based states that substances like fructose and some amino acids are absorbed with the help of carrier ions like $Na^+$, a mechanism called facilitated transport.
Fatty acids and glycerol are insoluble in water; they are incorporated into micelles, re-formed into chylomicrons in the mucosal cells and passed into the lacteals, without the help of $Na^+$.
Hence carrier ions like $Na^+$ facilitate the absorption of fructose and some amino acids.