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• when blood glucose is low, the pancreas releases glucagon, a peptide hormone which stimulates the liver to produce and excrete glucose. binding of the hormone to its receptor triggers a \""second messenger\"" cascade pathway that results in a change in the concentration or activity of many enzymes and signaling intermediates. the activity of some pathway enzymes is altered, as is the direction of net flow through some pathways.
  
• jackie robinson’s success in major league baseball encouraged white americans to
  
• how do monopolies affect the price of goods? monopolies always result in higher consumer prices. monopolies always result in lower consumer prices. monopolies have no effect on the cost of goods. monopolies can lower and raise their prices at will.
  
• which of the following should be included in a watershed map to best determine the non–point source of a pollutant, such as fertilizer, found in a river?
  
• a hot sun warms the surface of a lake on a calm day. what will happen to the cold water at the bottom of the lake? a. the cold water at the bottom will rise up and mix with the warm water at the top. b. the warm water at the top will sink down and mix with the cold water at the bottom. c. the cold water will remain at the bottom and won't mix very much with the warm water at the top. d. both a and b are true.
  
• which are characteristics of china? select three answers. it had foreign spheres of influence. it won the sino-japanese war. it failed to institute reforms. it avoided modernization. it rapidly industrialized.
  
• a zebra migrates to join a different herd of zebras. competition for sunlight leads to taller trees. the dna of a snake changes to make its venom stronger. a grassfire randomly sweeps through a population of buffalo and kills most of the animals.
  
• what is the first thing you should do as a coach when one of your students has sustained a bump or blow to the head or body and isn’t acting right?
  
• these bonds are backed by real estate holdings and equipment, and if a company goes bankrupt, the collateral can be sold off to compensate for the default. these bonds, more so than other collateralized securities, have prior claims over assets.
  
• microorganisms play an important role in creating nutrient-rich soil. please select the best answer from the choices provided t f