Available Answers

1. 1.

   Fill in the blanks.

   1.  _______________ gives shape to the eye and protects its inner parts.
   2.  ______________ and _____________ are the light sensitive cells in the retina.
   3.  _______________ is the coloured portion of the eye.
   4.  Three small bones of middle ear are called ____________, ______________ and _____________.
2. 2.

   Tick the most appropriate answer.

   1.  The tear glands are also called
      1.  lacrimal glands
      2.  sebaceous glands
      3.  ductless glands
      4.  oil glands
   2.  The layer of the eyes sensitive to light is
      1.  choroid
      2.  scleroid
      3.  conjunctiva
      4.  retina
   3.  Which of these statements is correct?
      1.  The pupil is the coloured part of the eye.
      2.  The retina is the outer layer of the eye.
      3.  The cornea is an opaque structure.
      4.  Lens focuses light rays on the retina.
   4.  The outer ear consists of 
      1.  pinna and ear canal
      2.  ear canal and eardrum
      3.  pinna and eardrum
      4.  eardrum and semicircular canal
   5.  The auditory nerve carries sound waves from the inner ear to
      1.  brain
      2.  middle ear
      3.  pharynx
      4.  pinna
   6.  Which of these perceives sound vibrations and converts them into sound impulses?
      1.  pinna
      2.  tympanum
      3.  cochlea
      4.  malleus
3. 3.

   Fill in the blanks.

   1.  The layer of the eyes that is partly transparent and partly opaque is _______________.
   2.  The middle ear is connected to the pharynx by ________________.
   3.  Tongue is covered by mucosa and numerous tiny bumps called ________________.
   4.  ________________ is responsible for determining the colour of the skin.
   5.  The outer epidermis of the skin is made up of ________________ tissue.
4. 4.

   State if the following statements are true or false. Correct the statement if it is false.

   1.  The innermost layer of the eye is the choroid.
   2.  Cones are the receptors responsible for coloured vision.
   3.  The optic nerve connects the inner ear to the brain.
   4.  The dermis is made up of connective tissue.
   5.  There are specific regions in the tongue that detect specific tastes.
   6.  Maintain correct body posture while reading.
5. 5.

   Find the odd one out. Give reasons for your choice.

   1.  choroid, scleroid, retina, iris, pinna
   2.  malleus, incus, stapes, cochlea
   3.  retina, rods, cones, lens, olfactory nerve
   4.  pain, hot, cold, pressure, sight
6. 6.

   What are sense organs? Name them.