1. True or false: The end organs (receptors) of smell are known as olfactory neurons.   True   False   Hint Hint       2. Small elevations on the tongue which contain taste buds are known as   Papillae   Gyri   Humps   Receptors   Half-n-half Clue   3. Layer of the eye in which rods and cones are found   Retina   Sclera   Choroid   Cornea   Hint       4. Identify iris in this diagram.   A   D   B   C   Hint       5. Thin watery fluid, which is filled in the space just behind the cornea   Vitreous humor   Aqueous humor   Gel   Half-n-half Clue   6. Coiled structure located in the inner ear is known as _______.   Eustachian tube   Helico trema   Cochlea   Semicircular canal   Half-n-half Clue   7. Which part of the internal ear is meant for hearing?   Ear Drum   Cochlea   Auditory Bones   All of these   Hint