Senses and the Brain Unit Test 6 of 86 of 8 Items Question In 3 to 5 sentences, explain how ears detect sound and how eyes detect light.(4 points) %C2%A0 Short Answer Rubric (4 points) Points Awarded Criteria 4 The answer is very clear. The answer is fully supported by details. There may be a few errors in grammar, usage, or mechanics. Errors do not interfere with meaning. 3 The answer is mostly clear. The answer is supported by mostly relevant details. There are a few errors in grammar, usage, or mechanics. Errors do not interfere with meaning.
The ears detect sound through a process called hearing. Sound waves enter the outer ear and travel through the ear canal to the middle ear. In the middle ear, the sound waves vibrate the eardrum, which then transmits these vibrations to the three small bones in the middle ear called the ossicles. The ossicles amplify the sound vibrations and send them to the cochlea in the inner ear. Inside the cochlea, tiny hair cells convert the sound vibrations into electrical signals, which are then sent to the brain through the auditory nerve.
The eyes detect light through a process called vision. Light enters the eye through the cornea and passes through the pupil, which dilates or constricts to regulate the amount of light entering the eye. The light then passes through the lens, which focuses it onto the retina at the back of the eye. The retina contains specialized cells called photoreceptors, specifically rods and cones. The rods are more sensitive to dim light and are responsible for peripheral vision, while cones are responsible for color vision in bright light. When light stimulates these photoreceptor cells, they send electrical signals to the brain through the optic nerve, which processes the information into visual images.