Final answer:
The most appropriate section of the chart for the statement "abdomen is non-tender, but slightly distended upon palpation" would be the Physical Examination section.
Step-by-step explanation:
The most appropriate section of the chart for the statement "abdomen is non-tender, but slightly distended upon palpation" would be the Physical Examination section. In this section, health care providers record their findings from the physical examination, including observations made during palpation. The description of the abdomen being non-tender and slightly distended is a physical examination finding and would be documented in this section.