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Question
Carrier ions like Na+ facilitate the absorption of substances like
Options:
A .  amino acids and glucose                        
B .  glucose and fatty acids          
C .  fatty acids and glycerol
D .  fructose and some amino acids
Answer: Option A
:
A
Na+ ions facilitates the absorption of glucose and amino acids. Secondary active transport is one of the two main types –
cotransport (e.g. glucose and some amino acids along with inward pushing of Na+) and counter transport (Ca2+ and H+import outwardly as excess Na+ passes inwardly).

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