Answer the following question given this paragraph: Farther from the heart, where the surge of blood has dampened, the percentage of elastic fibers in an artery's tunica intima decreases and the amount of smooth muscle in its tunica media increases. The artery at this point is described as a muscular artery. The diameter of muscular arteries typically ranges from 0.1 mm to 10 mm. Their thick tunica media allows muscular arteries to play a leading role in vasoconstriction. In contrast, their decreased quantity of elastic fibers limits their ability to expand. Fortunately, because the blood pressure has eased by the time it reaches these more distant vessels, elasticity has become less important. Notice that although the distinctions between elastic and muscular arteries are important, there is no "line of demarcation" where an elastic artery suddenly becomes muscular. Rather, there is a gradual transition as the vascular tree repeatedly branches. In turn, muscular arteries branch to distribute blood to the vast network of arterioles. For this reason, a muscular artery is also known as a distributing artery. Q: The thick tunica media allows muscular arteries to play a leading role in what? Choices: - inhibition - vasodilation - accumulation - vasoconstriction A:
vasoconstriction

Answer the following question given this paragraph: Bioterrorism is the intentional release or spread of agents of disease. The agents may be viruses, bacteria, or toxins produced by bacteria. The agents may spread through the air, food, or water; or they may come into direct contact with the skin. Two of the best known bioterrorism incidents in the U. S. occurred early in this century:. Q: The intentional release or spread of agents of disease is known as what? Choices: - act of war - pandemic - disaster - bioterrorism A:
bioterrorism

Answer the following question given this paragraph: Convection is the transfer of thermal energy by particles moving through a fluid. Thermal energy is always transferred from an area with a higher temperature to an area with a lower temperature. Q: What term is used to describe the transfer of thermal energy by particles moving through a fluid? Choices: - condensation - diffusion - evaporation - convection A:
convection

Answer the following question given this paragraph: 45.7 Behavioral Biology: Proximate and Ultimate Causes of Behavior Behaviors are responses to stimuli. They can either be instinctual/innate behaviors, which are not influenced by the environment, or learned behaviors, which are influenced by environmental changes. Instinctual behaviors include mating systems and methods of communication. Learned behaviors include imprinting and habituation, conditioning, and, most powerfully, cognitive learning. Although the connection between behavior, genetics, and evolution is well established, the explanation of human behavior as entirely genetic is controversial. Q: Behaviors are responses to stimuli. they can either be instinctual/innate behaviors, which are not influenced by the environment, or learned behaviors, which are influenced by this? Choices: - spontaneous mutation - osmosis - inheritance - environmental changes A:
environmental changes