Which one of the following is not a function of liver?

The liver is a vital organ with diverse metabolic and regulatory functions. It plays a central role in carbohydrate metabolism by converting excess glucose into glycogen for storage, a process known as glycogenesis [2]. It is also the primary site for the urea cycle, where toxic ammonia derived from amino acid metabolism is converted into urea for excretion [1]. Additionally, the liver contains specialized resident macrophages called Kupffer cells, which are responsible for the destruction and phagocytosis of dead or worn-out red blood cells and pathogens [3]. In contrast, the absorption of food (nutrients) primarily occurs in the small intestine, while the absorption of excess water from undigested food is a major function of the large intestine (colon). Therefore, option 4 is not a function of the liver.

Sources

1. [1] https://pmc.ncbi.nlm.nih.gov/articles/PMC4050641/
2. [2] https://www.sciencedirect.com/topics/biochemistry-genetics-and-molecular-biology/glycogenesis
3. [3] https://pmc.ncbi.nlm.nih.gov/articles/PMC4771376/