BIO320H5 Lecture Notes - Lecture 3: Tymbal, Mechanoreceptor, Motor Neuron
Document Summary
Most have ears in the thorax and have two of them, drum membrane, evolved from mechanoreceptors. Neurons tell them how the hind wings were moving. Those neurons were co-opted as vibration detectors the bats calls were so loud that they shook the moss the body. Moss vibrations - startle response and just freeze. Pinching upon the drum membrane have two neurons. We have in each ear 18000 neurons, crickets in elbows have 70. Different neurons within a population can have different signature shape, 2 different shapes of ap. A1- more sensitive to neurons and a2- more sensitive to neurons. A1: respond to sound to about 35khx. Odb is the threshold of human hearing- pin drops. Moths are tone deaf because a1 and a2 don"t overlap react to far bats and close at low frequency and high frequency the same. As a defensive moths fly to the ground.
