Answer the following question given this paragraph: 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. Q: What intensifies the response during homeostasis? Choices: - pressure loops - pure loops - negative feedback loops - positive feedback loops A:
positive feedback loops
------
Answer the following question given this paragraph: Acceleration is a vector, and thus has a both a magnitude and direction. Acceleration can be caused by either a change in the magnitude or the direction of the velocity. Instantaneous acceleration a is the acceleration at a specific instant in time. Deceleration is an acceleration with a direction opposite to that of the velocity. Q: Acceleration is a vector, and thus has a both a magnitude and what else? Choices: - temperature - pressure - wavelength - direction A:
direction
------
Answer the following question given this paragraph: In sexual reproduction, two gametes unite to produce an offspring. Which two gametes is a matter of chance. The union of gametes occurs randomly. Q: In sexual reproduction, two of what unite to produce an offspring? Choices: - DNA strands - spores - chromosomes - gametes A:
gametes
------
Answer the following question given this paragraph: Many enzymes are simple proteins consisting entirely of one or more amino acid chains. Other enzymes contain a nonprotein component called a cofactor that is necessary for the enzyme's proper functioning. There are two types of cofactors: inorganic ions [e. , zinc or Cu(I) ions] and organic molecules known as coenzymes. Most coenzymes are vitamins or are derived from vitamins. Q: Many enzymes are simple proteins consisting entirely of one or more of these? Choices: - alkali acid chains - interaction acid chains - proteins acid chains - amino acid chains A:
amino acid chains
------