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

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

• columnar
• cuboidal
• simple
• squamous

question 23

Explanation:

For Question 21: The diaphragm controls the amount of light passing through the microscope's stage opening; opening it allows more light to reach the specimen, making it appear brighter. Switching objectives changes magnification, fine adjustment focuses the image, and room light does not affect the microscope's specimen illumination.
For Question 22: Cuboidal epithelial cells have a regular, cube-like shape. Columnar cells are tall and narrow, squamous are flat and irregular, and "simple" refers to a single cell layer, not cell shape.

Answer:

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