Chapter 40 Flashcards
Tissue
Group of cells
Organ
Groups of tissues organized into functional units
Organ system
Group of organs that work together
2 major systems animals use to respond to stimuli
Nervous system and endocrine system
Endocrine system
System of organs that release signaling molecules into bloodstream
Nervous system
Organ system that transmit signals to specific locations in the body
Regulators
Animal that have mechanisms of homeostasis moderate internal changes in a particular variable in the face of external fluctuations of that variable
Conformers
Animal that have internal conditions conform in an environmental variable
Homeostasis
Maintenance of internal balance
Negative feedback
Form of regulation where accumulation of end product of a product of a process stops the process
Positive feedback
Control mechanism that amplifies the stimulus
Thermoregulation
Process by which animals maintain body temperature within normal range
Endothermic
Animals warmed mostly by metabolic processes
Ectothermic
Animals that gain heat from external sources
Poikilotherm
Animals who body temp vary with environment
