Diaphragm | MCQs

Explanation

Explanation

• The iris is the colored part of the eye that controls the amount of light entering the eye, much like a diaphragm in a camera.
• It adjusts its aperture (pupil) to regulate the amount of light that reaches the retina.

Explanation

• During exhalation, the diaphragm relaxes and moves upwards.
• It decreasing the volume of the thoracic cavity and allowing air to leave the lungs.

Explanation

• In both microscopes and human eyes, the iris (or diaphragm) controls the amount of light that enters the instrument or eye.
• In microscopes, it regulates the amount of light that reaches the objective lens.
• While in human eyes, it regulates the amount of light that enters the pupil.