Question

question 21
1 point
what adjustment makes a specimen appear brighter?

• switching from scanning to low power objective
• opening the diaphragm
• focus using the fine adjustment
• increase the amount of light in the room

clear selection
question 22
1 point
which term correctly describes epithelial cells with regular shape?

• columnar
• cuboidal
• simple
• squamous

clear selection

Explanation:

For Question 21: Adjusting the microscope's diaphragm controls the amount of light passing through the specimen; opening it lets more light through, making the specimen brighter. Changing objectives affects magnification/resolution, fine adjustment focuses, and room light does not impact the microscope's illuminated specimen.
For Question 22: Cuboidal epithelial cells are defined by their regular, cube-like (uniform) shape. Columnar cells are elongated, squamous are flat, and "simple" refers to cell layer count, not shape.

Answer:

Question 21: B. Opening the diaphragm
Question 22: B. Cuboidal