BIO202H5 Lecture Notes - Lecture 8: Stapes, Glycogen, Institute For Operations Research And The Management Sciences
Document Summary
Hair cells inside ear are sensitive to vibrations. Hair cells in reptiles: variation in tectorial membrane and firing of auditory nerve: malleus, incus, stapes, migrated and became part of middle ear structure. Basilar membrane (deflects hairs cells activates ions channels; less sensitive to frequency) When there is a tectorial membrane, animals are more sensitive to frequency: some frogs have different widths between basilar and tectorial membranes. Synthesis or release of insulin peptides: these peptides affect neuroendocrinal control centres which decreases production of juvenile hormones, this decrease in juvenile production hormones is a good thing and prevents you from further growing. Ecdysone + jh moult (if low jh it is a signal that adulthood has been reached) Important for release and production to help animal to grow and moult into next stage. Myosuppression inhibits ecdysone to prolong larval growth before animal grows again.
