BIOL 260 Lecture Notes - Lecture 13: Endocrine System, Sensory System, Venus Flytrap
Document Summary
Outline the main features of systems for sensing and responding to environmental change that are common to all organisms. Explain why sensing and responding systems are so different in animals and plants. Briefly describe some of the main sensing and responding systems in plants and animals. Environmental changes are across multiple time scales. Both plants and animals have mechanisms for sensing and responding at various time scales. All sensing and responding systems share the same fundamental features. External signal receiver transducer amplifier response. Similar in human-engineered devices and in living organisms: types of signals that can be detected. Organisms can only receive 3 types of signals: chemical (e. g. hormones, mechanical (e. g. sound waves - needs mechanoreceptor that receives the sound, electromagnetic (e. g. light waves - needs photoreceptors) Receptors are different for the different signals: role of receptor proteins. Cells can only receive a signal if they have the appropriate receptor protein.
