Questions: Select all that apply What are two characteristics of simple columnar epithelium? Cells change in response to increased tension. Cells are longer than they are wide. Cells are organized in many layers. Cells can be ciliated or non-ciliated.

The answer is the second one and the fourth one:

• Cells are longer than they are wide.
• Cells can be ciliated or non-ciliated.

Explanation:

1. "Cells change in response to increased tension." - This characteristic is more typical of transitional epithelium, not simple columnar epithelium.
2. "Cells are longer than they are wide." - This is correct. Simple columnar epithelium consists of cells that are taller than they are wide.
3. "Cells are organized in many layers." - This is incorrect. Simple columnar epithelium is a single layer of cells.
4. "Cells can be ciliated or non-ciliated." - This is correct. Simple columnar epithelium can have cilia (e.g., in the respiratory tract) or be non-ciliated (e.g., in the digestive tract).