QUESTION 1 The diagram below represents a part of the human ear. Explain the result if part A is blocked. Describe how part D, the semi-circular canais, plays a role in maintaining balance when the body changes speed and direction. Explain how the functioning of the ear would be affected if the bones in part C were fused.

43. All of the following statements concerning the bony and labyrinths are correct EXCEPT: A. receptors for auditory are located within the membranous labyrinth B. receptors for vestibular function are located within the membranous labyrinth C. three semicircular ducts are located in the semicircular canals membranous

.4 Figure shows the internal structure of the ear. Label and Describe in details how A-G structure works collectively in the hearing mechanism.

Question 39 The conformational change of retinal, from the cis to trans configuration, indirectly: Hyperpolarizes the photoreceptor by closing Na+ channels. Hyperpolarizes the photoreceptor by opening Na+ channels. Depolarizes the photoreceptor by opening Na+ channels. Depolarizes the photoreceptor by closing Na+ channels. Question 40 If a skeletal muscle is no longer able to make enough ATP, then: O There will be low levels of acetylcholine at the motor endplate.