Answer the following question given this paragraph: Figure 6.17 Centrifuges use inertia to perform their task. Particles in the fluid sediment come out because their inertia carries them away from the center of rotation. The large angular velocity of the centrifuge quickens the sedimentation. Ultimately, the particles will come into contact with the test tube walls, which will then supply the centripetal force needed to make them move in a circle of constant radius. Q: Centrifuges use what to perform their task? Choices: - absorption - jets - magnetism - inertia A:
inertia
Answer the following question given this paragraph: A given liquid will evaporate more quickly when it is heated. This is because the heating process results in a greater fraction of the liquid's molecules having the necessary kinetic energy to escape the surface of the liquid. The Figure below shows the kinetic energy distribution of liquid molecules at two temperatures. The numbers of molecules that have the required kinetic energy to evaporate are shown in the shaded area under the curve at the right. The higher temperature liquid (T 2 ) has more molecules that are capable of escaping into the vapor phase than the lower temperature liquid (T 1 ). Q: Because heating results in a greater fraction of molecules having the necessary kinetic energy to escape the surface of the liquid, what occurs more quickly when liquid is heated? Choices: - oxidation - expansion - absorption - evaporation A:
evaporation
Q: Answer the following question given this paragraph: The process in which organ systems work to maintain a stable internal environment is called homeostasis. Keeping a stable internal environment requires constant adjustments. Here are just three of the many ways that human organ systems help the body maintain homeostasis:. Q: What is the process in which organ systems work to maintain a stable internal environment? Choices: - ketosis - homogeneity - organ balance - homeostasis A:
A: homeostasis
Question: Answer the following question given this paragraph: The kidneys filter blood and form urine. They are part of the urinary system, which also includes the ureters, bladder, and urethra. Q: What organs filter blood and form urine? Choices: - the appendix - the spleen - the liver - the kidneys A:
Answer: the kidneys
*Question*
Answer the following question given this paragraph: Respiration begins with ventilation. This is the process of moving air in and out of the lungs. The lungs are the organs in which gas exchange takes place between blood and air. Q: What is the organ in which gas exchanges take place between blood and air? Choices: - heart - skin - kidney - lungs A:
**Answer**
lungs
Q: Answer the following question given this paragraph: The target cell then needs to be able to recognize the signal. Chemical signals are received by the target cell on receptor proteins. Most receptor proteins are found associated with the plasma membrane, but some are also found inside the cell. Receptor proteins are very specific for only one particular signal molecule, much like a lock that recognizes only one key. Therefore, a cell has lots of receptor proteins to recognize the large number of cell signal molecules. There are three stages to sending and receiving a cell "message:" reception, transduction, and response. Q: Chemical signals are received by the target cell on what? Choices: - acidic proteins - inceptor proteins - parent proteins - receptor proteins A:
A: receptor proteins