Ques: Q: What intensifies the response during homeostasis? Read this paragraph and choose the correct option from the provided answers: 1.5 Homeostasis Homeostasis is the activity of cells throughout the body to maintain the physiological state within a narrow range that is compatible with life. Homeostasis is regulated by negative feedback loops and, much less frequently, by positive feedback loops. Both have the same components of a stimulus, sensor, control center, and effector; however, negative feedback loops work to prevent an excessive response to the stimulus, whereas positive feedback loops intensify the response until an end point is reached. Choices: - pressure loops - pure loops - negative feedback loops - positive feedback loops A:
Ans: positive feedback loops

Ques: Q: When the ph of precipitation is lowered because of air pollution, what results? Read this paragraph and choose the correct option from the provided answers: All life relies on a relatively narrow range of pH, or acidity. That's because protein structure and function are very sensitive to pH. Air pollution can cause precipitation to become acidic. Nitrogen and sulfur oxides, mainly from motor vehicle exhaust and coal burning, create acids when they combine with water in the air. The acids lower the pH of precipitation, forming acid rain . If acid rain falls on the ground, it may damage soil and soil organisms. If it falls on plants, it may kill them (see Figure below ). If it falls into lakes, it lowers the pH of the water and kills aquatic organisms. Choices: - abnormal rain - climate change - sleet - acid rain A:
Ans: acid rain

Ques: Q: Reducing the number of molecules in a rigid container causes what to decrease? Read this paragraph and choose the correct option from the provided answers: The canister on the left contains a gas at a certain pressure. The attached air pump is then used to double the amount of gas in the canister. Since the canister cannot expand, the increased number of air molecules will strike the inside walls of the canister twice as frequently as they did before. The result is that the pressure inside the canister doubles. As you might imagine, if more and more air is continually added to a rigid container, it may eventually burst. Reducing the number of molecules in a rigid container has the opposite effect and the pressure decreases. Choices: - velocity - demand - energy - pressure A:
Ans: pressure

Ques: Q: Gas particles can move randomly in what directions? Read this paragraph and choose the correct option from the provided answers: Christopher Auyeung. Gas particles move randomly in all directions . CC BY-NC 3.0. Choices: - one direction - few directions - some directions - all directions A:
Ans:
all directions