Class XI

Human internal ear is :
  1. mesodermal in origin
  2. comprising of ear pinna
  3. ectodermal in origin
  4. endodermal in origin
Gustatoreceptors are responsible for the sense of :
  1. pain
  2. touch
  3. pressure
  4. taste
Among photoreceptors cones are responsible for bright light vision and they also : i. give colour vision because they contain 3 different pigments. ii. pigments are sensitive to red,green and yellow lights. iii. pigments are sensitive to red,green and blue lights. iv. individual cone cell contains all the three pigments in it.
  1. only statement i), iii) and iv) are correct.
  2. only statement i) and iv) are correct.
  3. only statement i), ii) and iv) are correct.
  4. only statement i) and iii) are correct.
Part of brain that acts as relay centre to receive and transmit general sensations except smell :
  1. Midbrain
  2. Hypothalamus
  3. Thalamus
  4. Epithalamus
The space within cochlea called scala media is filled with
  1. Perilymph
  2. Labyrinth
  3. Epilymph
  4. Endolymph
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