1. In addition to sight what are the four other special senses?
2. What four structures of the eye does light pass through to reach the retina?
3. What four types of light do the pigments in the photoreceptor cells (rod and cones) detect?
4. What is the first structure that a sound wave comes into contact with when it passes through the external ear, and what are the three ossicles of the ear called?
5. What do the four sense organs of the skin sense?
ANSWER: taste buds; sweet, sour, salty