BIO 1150 1st Edition Lecture 5Topic Discussed: Animal Form and FunctionPhysiology of Animals-1. Organism diversity and methods of adaptation2. Diversity causes“Model organisms”- animals used for experimentation because of convenient features- Includes: fruitflies, mice, zebrafish, roundwormForm and function relationship- each evolutionary form is meant to perform a specific function to help the organism surviveHomeostasis- the act of maintaining body heat- Organisms are not equal to the environment in temperature and salt concentration- To maintain this organisms regulate energy by negative feedbackNegative feedback- one of organisms’ natural regulators- Set point- natural point (usually temp) that is to be maintained so that the organism can survive- Sensor- mechanism that is able to detect any variation from the set point- Effector- mechanism that responds to the sensor to bring the organism back to the set point- Communicators- (nervous/ endocrine system) transmits all of these signals all over the bodyPhysiological variables (ie. Blood pressure) are regulated by several “redundant” systems- Homeostatic control systems overlap- Sweating- reduces body temperature, sodium content, body fluid volumeHomeostasis- never constant, controlled so that organism is able to surviveThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.- Methods include- curling up or grouping together for warmthTemperature affects biology-- Chemical reaction rates, protein function and molecules are subjective to temperatureHomeotherms-regulate body temperature using metabolism- Endotherms- source of heatEctotherms-body temperature is based on environment temperature- Slower metabolism- Can regulate body heat using behaviorOrganisms vary widely in size- Different size animals have similar body forms- Many aspects of biology vary with body size (ie. Metabolism speed, brain weight,Allometry- used for comparing
View Full Document
Unlocking...