The Incredible Human Body Quiz

<p>Digestive enzymes</p> Signup and view all the answers

<p>Volcanic eruptions</p> Signup and view all the answers

<p>Diffusion is the movement of molecules from an area of high concentration to an area of low concentration. In the body, it plays a crucial role in getting oxygen and nutrients to cells by allowing these substances to pass through cell membranes and reach the areas where they are needed most.</p> Signup and view all the answers

<p>The three lines of defense in the immune system are the physical and chemical barriers, the innate immune response, and the adaptive immune response. Physical and chemical barriers, such as the skin and mucous membranes, act as the first line of defense by preventing pathogens from entering the body. The innate immune response, which includes inflammation and the release of antimicrobial substances, provides immediate but nonspecific protection. The adaptive immune response, involving specialized cells and antibodies, provides a targeted and long-lasting defense against specific pathogens.</p> Signup and view all the answers

<p>Homeostasis is the ability of the body to maintain a stable internal environment despite external changes. The nervous system plays a crucial role in maintaining homeostasis by receiving and processing signals from the body and coordinating appropriate responses. It helps regulate body temperature, heart rate, blood pressure, and other physiological processes to keep them within normal ranges.</p> Signup and view all the answers

<p>Producers, such as plants and some bacteria, convert sunlight into chemical energy through photosynthesis. Consumers, including herbivores, carnivores, and omnivores, obtain energy by consuming producers or other consumers. Decomposers, such as bacteria and fungi, break down organic matter and release nutrients back into the ecosystem. Together, these organisms form a food chain or a food web, where energy flows from producers to consumers and ultimately to decomposers.</p> Signup and view all the answers

<p>Two examples of natural disasters are floods and bushfires. Floods can lead to habitat destruction, displacement of organisms, and changes in water quality. They can also disrupt the natural flow of energy and nutrients in an ecosystem. Bushfires can cause extensive damage to vegetation, leading to habitat loss and changes in biodiversity. The heat and smoke from bushfires can also directly harm or kill organisms, and the resulting ash can affect soil fertility and water quality.</p> Signup and view all the answers