Question

Just as hydrochloric acid to pepsinogen, so is

• A. Haemoglobin to oxygen
• B. Enterokinase to trypsinogen
• C. Bile juice to fat
• D. Glucagon to glycogen

Answer 1

The correct option is B Enterokinase to trypsinogen

In the stomach, chief cells release pepsinogen. This zymogen is activated by the HCl, which is released from parietal cells in the stomach lining. The hormone gastrin and the vagus nerve trigger the release of both pepsinogen and HCl from the stomach lining when food is ingested.

Similarly, enterokinase is produced by the duodenal mucosa. It activates trypsinogen, a pancreatic enzyme, which in turn activates the remainder of the enzymes facilitating protein digestion.

So, option B is the correct option.