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Bio 100 exam 4 AHC 2025 Questions and Answers List the organized hierarchy of most animal bodies (begin with cells) ....ANSWER☑️☑️...-Cells, tissues, organs, organ systems, organism. Explain the concept of homeostasis. - ....ANSWER☑️☑️...-Homeostasis is the ability of an organism to maintain a stable internal environment despite external changes. What is a negative feedback loop? Give an example in the human body. ....ANSWER☑️☑️...-A negative feedback loop is a mechanism that reduces or stops a process to maintain homeostasis. An example is the regulation of body temperature: if the body gets too hot, mechanisms like sweating are activated to cool it down. Describe the thermoregulation of endothermic and ectothermic animals. ....ANSWER☑️☑️...-Endothermic animals generate their own heat internally, while ectothermic animals rely on external sources for heat. How are homeotherms different than heterotherms? - ....ANSWER☑️☑️...Homeotherms maintain a constant internal body temperature, while heterotherms can have variable body temperatures. What is the function of the digestive system? - ....ANSWER☑️☑️...-The function of the digestive system is to break down food, absorb nutrients, and eliminate waste FOR STUDY PURPOSES ONLY, ©️2025 ALL RIGHTS RESERVED 1