Question

The absorption of nutrients, like amino acids, occurs via co-transport channels, which couple with the movement of $Na+$. Which of the following statement is true for this type of co-transport?

• A. In this both amino acids and $Na+$ move down a electrochemical gradient.
• B. Both amino acids and $Na+$ are absorbed agfainst the electrochemical gradient
• C. Amino acids are absorbed against the electrochemical gradient and $Na+$ moves towards the electromagnetic gradient.
• D. Amino acids move towards the electrochemical gradient and $Na+$ against the electrochemical gradient.

Answer 1

The correct option is D Amino acids move towards the electrochemical gradient and $Na+$ against the electrochemical gradient.

The transport of amino acids takes place with the help of co-transporters where amino acids move along the concentration gradient while Na^+ moves against the concentration gradient.

So, the correct answer is 'Amino acids move towards the electrochemical gradient and Na+Na+ against the electrochemical gradient'