11.3.2 The Eye

• What type of cells are sensitive to light in the eye?

  Rod cells and cone cells

  
• What is the function of rod cells in the eye?

  They are more sensitive to light

  
• How many types of cone cells are there?

  Three different types
• What is the role of the retina in the eye?

  It receives light and contains receptors
• What happens to the pupil in dim light?

  The pupil dilates to allow more light

  
• What happens to the pupil in bright light?

  The pupil constricts to prevent damage

  
• What muscles control the pupil's size?

  Circular and radial muscles in the iris

  
• How do circular and radial muscles work together?

  They work antagonistically to control pupil size
• What is accommodation in the eye?

  The lens changes shape to focus images
• What happens to the lens when focusing on a distant object?

  The lens becomes thinner and flatter

  
• What happens to the lens when focusing on a near object?

  The lens becomes fatter and rounder

  
• What determines the shape of the lens?

  Ciliary muscles in the eye
• What happens to the suspensory ligaments when ciliary muscles are relaxed?

  They become loose

  
• What happens to the suspensory ligaments when ciliary muscles are contracted?

  They become slack