BIO202H5 Lecture Notes - Lecture 41: Angular Acceleration, Taste Receptor, Cyclic Adenosine Monophosphate
Document Summary
Salty substances: sodium from food enters taste receptor cell through a sodium channel, depolarization opens voltage-gated calcium channels, depolarization causes an influx of calcium, which in turn causes neurotransmitter release into the synaptic space. Statocytes have statoliths inside of them that move, telling the organism something about their orientation in space (statocysts help invertebrates orient themselves with respect to gravity) Cephalopods have more complex statocysts organized in three chambers that occupy three different planes. Statocysts in two of the chambers, christae (vertical crista and anticrista), detect angular acceleration. Stomatocysts on the third chamber, macula, detect forward acceleration. Not only is there a harder structure that moves within a larger area, there is also a difference of the equilibrium systems being organized into multiple components (a 3d system) In vertebrates, sensory receptors for interpretation of equilibrium are hair cells that are embedded in cup- shaped sensory organs (neuromasts)
