Anatomy & Physio Lab 2 - Ear and Taste

Circle lab time: 9 am, 10 am, 11 am, 12 pm, 2 pm, 3 pm, 4 pm, 5 pm Anatomy and Physiology II Lab The ear and taste Exercise 25 Pre-lab quiz (page 373 in your lab manual). Place answers here. 1. three 4. stapes 2. auricle 5. cochlea 3. tympanic membrane 1. Identify all indicated structures and ear regions in the following picture. a b d c ef g h i k j a. auricle c. middle ear e. cochlear nerve b. external acoustic meatus d. semicircular duct f. cochlea g. inner ear h. pharyngotympanic tube i. lobule j. outer ear k. tympanic membrane 2. Identify the structures of the middle ear indicated on the following picture. b c a d e f i a. cochlear nerve c. vestibule e. stapes g. malleus g h b. facial nerve d. semicircular ducts f. incus h. tympanic membrane i. cochlea 3. Identify the parts of the histological cochlea. A. vestibular membrane B. tectorial membrane C. basilar membrane Activity 4 Frequency of hearing Results (pg 378) Which tuning fork was hear MOST clearly and comfortably? 2048 Hz Which was heard LEAST well? 128 Hz Webber Test Results (pg 379) Is the tone equally loud in both ears, or is it louder in one ear? I hear it on both sides Rinne Test Results (pg 379) Right ear positive Left ear positive Does the subject hear better by bone or by air conduction? Air conduction Activity 7 Balance Tests Results (pg 382) 1. Is he/she able to walk without significant wobbling from side to side? Yes Did he/she experience any dizziness? No Was nystagmus present? No 2. Did your lab partner have any difficulty locating and picking up the coins? No Describe your observations and your lab partner’s observations during the test. My lab partner was not wobbling significantly and could walk in one straight line. She also had no problem picking up the pens off from the floor. What kinds of complex interactions involving balance and coordination must occur for a person to move fluidly during this test? They need a working inner ear (vestibule and semicircular ducts) for balance and vision (eyes) to move well during these tests Romberg Test Results (pg 383) Questions are in the lab manual. Record results here. 2. not many swaying movements were observed 3. not much side to side movement but front to back movement was heavily present 4. Do you think the equilibrium apparatus of the internal ear was operating equally well in all these tests? Yes because the inner ear does not rely on information from the eyes for balance. The proprioceptors? Yes, the proprioceptors continuously send information to the brain (cerebellum) whether or not the eyes are opened or closed. Why was the observed degree of swaying greater when the eyes were closed? The person had no vision to aide with maintaining body equilibrium. What conclusions can you draw regarding the factors necessary for maintaining body equilibrium and balance? We need vision to help aide with body equilibrium. If there is no vision, body equilibrium will not function to its best ability. What conclusions can you draw regarding the factors necessary for maintaining body equilibrium and balance?. Many factors contribute to our body’s equilibrium. We need our ears, eyes, and brain to all work together to maintain balance. Role of Vision in Maintaining Equilibrium Results (pg 384) Follow the directions in your lab manual. Record results here. Record the observations Small amounts of side to side movement was seen throughout the time the partner was standing on one leg. Rest for 1 to 2 minutes. Repeat experiment with the same foot raised and your eyes closed. Record the observations Significant side to side movements were seen where my partner was almost on the verge of falling. Exercise 26 Pre-lab quiz (page 389 in your lab manual). Place answers here. 1. olfactory epithelium 4. anterior 2. bipolar 5. two 3. papillae 1. Identify the parts of the taste bud so labeled. Foliate papillae Taste buds