Complete the paragraph by choosing the appropriate words from the word bank. You

Question

Complete the paragraph by choosing the appropriate words from the word bank. You may have to use some words more than once and some words not at all. basilar - close - cochlea - depolarizes - hair - hyperpolarizes - kinocilium - neurohormones - neurotransmitters - open - organ of Corti - polarizes - stereocilia - tectorial- tympanic - vestibular apparatus The sound-sensitive cells of the ear are located in the (1)_________. This coiled structure contains three ducts. Inside the central cochlear duet, sitting on the (2) _________ membrane, is a structure called the (3)_________that consists of (4)_________cells and support cells. From the apical surface of each sensory cell protrude finger-like projections called (5) _________. which are connected to one another by tip links. The tallest cilium is called the (6) _________. This tallest cilium connects to the (7) _________ membrane, which overlies organ of Corti. Sound waves moving through the cochlea primarily cause movement of the (8) _________ membrane. This motion is transmitted to the (9) _________ and subsequently passed onto the (10). When stereocilia bend towards the (11) _________, the tip links cause more ion channels to (12) _________ and the membrane potential of the hair cell (13) _________. This increases the release of (14) _________ from the hair cell. When stereocilia bend away from the (15) _________, the tip links cause more ion channels to (16) _________ and the membrane potential of the hair cell (17) _________ This decreases the release of (18) _________ from the hair cell.

Explanation / Answer

cochlea basilar membrane organ of corti Hair cells stereocilia kinocilium tectotial membrane (TM) basilar membrane (BM) vestibular apparatus tympanic duct scala vestibuli open depolarize neurotransmitters scala vestibuli close hyperplarized

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