Human Physiology Exam 2 Study Guide | With Complete Solution | 100% Verified

Inner Ear {Ans: Fluid Filled areas A) Cochlea - Hearing -Vibrations distort stererocilia -Volume = how hard they vibrate -Pitch = where on the organ of corti the vibration occurs -Hearing loss = membrane is less elastic (High pitch goes first) B) Vestibular Apparatus - parts used in combination for complex movement, also to control eye movement and maintain stable visual field -Semicircular Canals *Fluid filled canal (3 of them, each in a different plane) *Canal has hair cells with a gel hat *Tells about side/side movement *Fluid covering stererocilia distorts them *Each in a different plane -Vestibule *There is a layer of hair cells in the utricle and the saccule *On top of the hair cells there is a gelatinous matrix which will float around *Tell us when we start/stop movement -----Need this info to control muscles and balance *Hair cells move C) Outer Ear - funnels in vibrations}Adrenergic {Ans: Chemicals that inhibit mimic or enhance epinephrine Specifically for EPINEPHRINE Alpha Receptors -G-Protein --> Various Pathways Beta Receptors -G-Protein --> cAMP Pathway BOTH can be excitatory or inhibitory depending upon cell type BOTH can be broken down by monoamineoxidase Monoamineoxidase Inhibitor (MAOI) -Inhibits enzyme that breaks down