Fill in the blanks
(1) ……… Enterokinase (2) …………

Explanation

### Step-by-Step Solution:

1. **Identify the Enzyme**: The first blank is for the enzyme "Enterokinase". This enzyme is crucial in the digestive process as it activates other enzymes.

2. **Understand the Function of Enterokinase**: Enterokinase is secreted by the brush border cells of the small intestine (specifically in the duodenum). Its primary role is to convert the inactive enzyme trypsinogen into its active form, trypsin.

3. **Fill in the Second Blank**: The second blank should be filled with "trypsinogen", which is the inactive form of the enzyme that Enterokinase acts upon.

...