Content Preview

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 ...©️ 2025, ALL RIGHTS RESERVED 1