Eye - Warmup Quiz

• the general name for visual pigments found in cones is called...

  iodopsin
• which one is true?

  when the ciliary muscles are relaxed, the lens is flatter, and distant objects are in focus
• the parts of the vascular layer of the eye are

  choroid, ciliary body, and iris
• all of these are true

  • visual pigments are proteins that change their shape due to a reaction with photons
  • cones have three types of iodopsin visual pigments
  • rods have rhodopsin as the visual pigment
• how many rod cells are in the human retina?

  92,000,000
• this fills the anterior chamber

  aqueous humor
• the transparent region that is continuous with the sclera

  cornea
• name for increase in intraocular pressure

  glaucoma
• the type of fibers that form the sclera

  type I collagen
• this fills the posterior chamber

  aqueous humor
• the white of your eye

  sclera
• inflammation of this is called "pink eye"

  conjunctiva
• the "blind spot" is also known as the...

  optic disk
• these are true of lacrimal glands

  • lacrimal glands are different from tarsal glands
  • tears from the lacrimal glands pass into the nasal passages by way of the nasolacrimal duct
  • lacrimal glands are serous tuboloacinar glands
• provides physical support for the shape of the eye

  sclera
• controls the amount of light coming into the eye

  iris
• converts light to nerve impulses

  neural layer of retina
• provides sites of attachment for the muscles that move the eye

  sclera
• bends incoming light

  lens
• functions in change in the shape of the lens

  ciliary body
• secretes aqueous humor

  ciliary body
• contains photoreceptors

  neural layer of retina
• vascularized tissue that supplies nutrition to the retina

  choroid
• absorbs extraneous light

  pigmentated layer of retina
• composed of layers of smooth muscle

  iris
• vision is the sharpest in the fovea region of the retina. why?

  • very few capillaries are present in the fovea
  • the cone cells are abundant and tightly packed
  • the cell bodies of the ganglion cells are peripheral to the fovea