ESYS 101 Lecture Notes - Lecture 11: Mechanoreceptor, Ocean Acidification, Hydrostatics
Document Summary
Thermal: heat, cold - more dramatic on land. Touch and vibration - water and land. Taste - chemicals move slower in water. Detecting (environmental) change and responding to it. Many organisms are sensitive to light, but not all have image-forming eyes. Rod cells (dim light): rhodopsin-light absorbing pigment. Cones (bright light and color vision): red, green, blue pigments. Important for schooling behavior, predator and prey detection. Water striders use surface waves for sex discrimination. Multiple neurons at base, one a mechanoreceptor, others sensitive to salt, sugar, etc. Catfish can detect amino acids at 1/100th tsp in olympic-size pool. Some animals in water are better at detecting chemicals bc it"s all over their body vs us with just our tongue. Open through pores in skin in canals. Cell body (or soma): nucleus, mitochondria, and other organelles. Dendrites : receive info from another cell and transmit the message to. Axon : conducts messages away from cell body cell body conducted.
