Hearing and Thermoregulation

BIOL2215 Summary – ML

Auditory system

Sound = pressure change in the medium (e.g. Air / Water)

Amplitude ( Loudness ( degree of eardrum movement ( amount of hair cell activated ( amount of action potential produced

Frequency ( pitch ( speed of eardrum vibration ( types of hair cell activated ( types of neural signal interpreted by the brain

| |Outer ear |Middle ear |Inner ear |Others |

|Insects | |Tympanal organ (without | |Statocyst receptor system,|

| | |bone) and particle | |cuticular sensory hair |

| | |displacement sensitive | |with asymmetric basal |

| | |receptor hairs for | |joint and polarizing the |

| | |detecting substrate borne | |hair in particular |

| | |vibrations | |direction for balance in |

| | | | |invertebrate |

|Fish | | |For equilibrium: Pars |Air filled swim bladder |

| | | |Superior---three |for sound localization and|

| | | |Semi-circular canals, |sound amplification . |

| | | |Otolith organs, utriculus |weberian apparatus to |

| | | |...