After a meal, blood entering the liver has higher levels of what substance than the blood leaving

the liver?
A.

To determine the substance level in the blood entering and leaving the liver after a meal, we need to understand the digestion and metabolic processes that occur in the liver.

During a meal, the digestive system breaks down carbohydrates, proteins, and fats into smaller molecules. These molecules are then absorbed into the bloodstream and transported to the liver.

In the liver, various metabolic processes take place, such as glycogen synthesis, protein synthesis, and lipid metabolism. One of the primary substances affected during these processes is glucose.

The substance in question is glucose, which is a form of sugar that is derived from the breakdown of carbohydrates. After a meal, blood entering the liver, known as the portal vein, will contain higher levels of glucose compared to the blood leaving the liver.

The liver plays a crucial role in regulating blood glucose levels by storing excess glucose as glycogen and releasing it into the bloodstream as needed. When blood glucose levels are high, the liver takes up glucose from the portal vein and converts it into glycogen. As a result, the blood leaving the liver, known as the hepatic vein, will have lower levels of glucose.

Therefore, the correct answer is A. Glucose.