Question

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

Answer 1

The correct option is A amino acids and glucose

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 (Ca ²⁺ and H⁺ import outwardly as excess Na⁺ passes inwardly).