19. Use the passage to help answer the questions below. Scoring Rubric (click here) Part A (2 points): If you were designing an investigation to test how the body maintains temperature in hot conditions, what dependent variable(s) do you think you would want to measure and observe? Explain your reasoning (i.e., Why would you want to measure and observe those things?). Part A Help Suggested ways to structure your sentences If I want to investigate how the body maintains temperature in hot conditions, I would use ... as my dependent variable(s) because ... Part B (2 points): Describe how the data from this investigation could show evidence of homeostasis in action. Explain your reasoning (i.e., Why would that pattern in the data be evidence for homeostasis?). Part B Help Suggested ways to structure your sentences If we were looking for evidence of homeostasis in action within our data from this investigation, we would expect the data to .... The data should show this pattern because ...

Staying Cool When summer heat rises, your body works hard to keep things balanced through a process called homeostasis. Homeostasis is your body's way of keeping internal conditions (e.g., temperature, water levels, and heart rate) stable, even when the outside environment changes. Imagine you're outside on a hot day, playing basketball or walking in the sun. As your body heats up, your brain senses the rising temperature and sends signals to help cool you down. Qne major response is sweating. Sweat glands in your skin release moisture, and as the sweat evaporates, it carries heat away from your body. At the same time, your blood vessels near the surface of your skin widen (i.e., vasodilation) so more heat can escape. These actions help keep your body temperature close to 98.6F (37C), which is the ideal range for your organs to function properly. Without these homeostatic responses, your body could overheat, leading to dangerous conditions like heat exhaustion or heat stroke. So the next time you're wiping sweat off your forehead in the summer sun, remember, your body is doing an amazing job keeping things in balance