BIOL 119 Chapter Notes - Chapter 47: Taste, Membrane Potential, Homeostasis

• School: SUNY Geneseo
• Department: Biology
• Course: BIOL 119
• Professor: Feissner Robert

Document Summary

Male moths can detect mates through sensing the chemical attractant females release into the air. However, some moths can detect the sounds bats make and quickly escape. The ability to sense a change in the environment depends on three processes: transduction: conversion of an external stimulus to an internal signal in the form of action potentials along sensory neurons. Sensory cells are polarized in their resting state. When ion ows cause the inside of the membrane to become more positive, the cells are depolarized. When the interior of the cell is more negative than resting state, hyperpolarized: sensory receptors transduce sensory output to a change in membrane potential. Ex. ear neurons temporal lobes and eye neurons occipital lobe. Mechanoreception = detecting the sensation of pressure changes: ex. crabs have a statocyst, an organ lined with pressure receptor cells and a small calcium-rich particle that rests on the bottom.