Carrier ions like `Na^(+)` facilitate the absorption of substance like

Options

A. amino acids and glucose
B. glucose and fatty acids
C. fatty acids and glycerol
D. fructose and some amino acids.

Answer

C, D

Explanation

Active transport occurs with the help of energy, usually against concentration gradient. For this, cell membrane possesses carriers and gated channels. Active transport of one substance is often accopanied by permmeation of other substances.
The phenomenon is called secondary active transport. It is of two main types i.e., Co-transport, (e.g., glucose and some amino acids along with inward pushing of excess `Na^(+)` and counter transport `(Ca^(2+)` and `H^(+)` movement outwardly as excess `Na^(+)` passes inwardly).