Which of the following best explains why this is an example of a negative feedback loop? (please read each choice carefully)

a. when the levels drop below their set point, the pancreas brings it back to the set point

b. it is the process that puts sugar into our blood

c. it adds more and more sugar to our blood so that we can make ATP

d. when sugar levels drop below or rise above the set point, we have mechanisms in place to bring the sugar levels back to a set point.

Which of the following statements is correct in hour our immune system responds to a potential pathogen? a. the adapted immune system will call on the innate immune system to destroy the pathogen. b. b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c. the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. d. the t-cells in the adapted immune systems are the first to recognize the pathogen vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a. antigen, antibody b. antibody, antigen c. antibody, antibiotic d. antibiotic, antibody