14. Describe the conditions that would cause us to see each of the three basic types of spectra. What do we see in the Sunâs spectrum shown on the opening page of this chapter? 18. Describe the Doppler Effect for light and what we can learn from it. What does it mean to say that radio waves are blueshifted? Why does the Doppler Effect widen the spectral lines of rotating objects? Test Your Understanding Each of the following statements makes some type of claim. Decide in each case whether the claim could be
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An antigen is defined as a substance that reacts with antibody molecules and antigen receptors on lymphocytes. An immunogen is an antigen that is recognized by the body as non-self and stimulates an adaptive immune response. For simplicity, both antigens and immunogens are usually referred to as antigens.n antigen is defined as a substance that reacts with antibody molecules and antigen receptors on lymphocytes. 2. An immunogen is an antigen that is recognized by the body as non-self and stimulates an adaptive immune response.