BIOL 2002C Lecture Notes - Lecture 2: Ear Canal, Cochlear Duct, Semicircular Canals
Document Summary
The three parts of the internal, middle, and external ear. The external and middle ear are involved with sound wave transmission. The internal ear functions in both hearing and equilibrium. Receptors for hearing and equilibrium respond to separate stimuli and are activated independently. Terms to know: auricle, helix, lobule, external, middle, and internal ear, external acoustic meatus, tympanic membrane, pharyngotypanic tube, malleus. Through the otoscope you examine the malleus and tympanic membrane. Vestibular apparatus- equilibrium receptors in the semicircular canals and vestibule maintain orientation and balance in space. Vestibular receptors monitor static equilibrium and linear acceleration. Mechanoreceptors of static equilibrium in the vestibule interpret positioning. Of the head thus permitting the cns to maintain stability and posture when the head and body are not moving. Uses hormones to give control over metabolic activities of the cells. Endocrine glands are- pituitary, thyroid, parathyroid, adrenal, pineal, and thymus. The pancreas and gonads also produce both hormones and exocrine product.
