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CHAPTER 6  ■  Erythrocytes: Hemoglobin                           133




                                                                                          RBC                                                                               FIGURE 6.16  I                               -

                                                                                     destruction                                                                               m                        .





                                                                                     Hemoglobin






                                                                                     Haptoglobin

                                                                                            +
                                                                             alpha and beta dimers




                                Haptoglobin-hemoglobin complex




                                                                                                                                              Kidney
                    Catabolized
                                                                                                                                                  Hemosiderin is
                                                                                                                                                  formed and
                                                                                                                                                  excreted in

                                                                                                                                                  the urine or
                                                                        Liver                        Hemoglobin                                   remains in

                                                                                                                                                  tubular cells






                                                                                              Hemoglobin



                                                                                                                               Hemoglobin

                                                                         Heme               Methemoglobin                             or
                                                                                                                               Hemosiderin

                   Hemopexin                                                +




                                       Methemalbumin                      Albumin





                         k       . B                                     m             m           -                                H  m                    x                     m      x   -                       -
                                                                             -    m                  m     x,                            m                        m              m  m       m       m


                                            m                                                  m        .                      m          m      x                      . O                         ,     m      x
                   O             m                                                                        -                            m                   ,                  m     x            q                     -


                         ,                    m                                         m                -                          z                            .
                                                      m                  k          ,                                               T       m                                                             m      x


                                                     ,                                 m            . T                                                 m       m       m     m           hemosiderinuria
                                               k                          m                /                                                                                        m                m                      -


                      m            . O                                                             k                           m                                                                 . T
                             x           ,            m                    m       m                                           m       m       m            m                     m      x                    with-


                                                     . T                                                  m  -                 out     m
                                                                                                                               (  .  .,        -        m                                                        ).



                    .  H  m                      ,        m

                    .  Ex                    m                                                                                   NOTE: This is a good time to complete end of chapter

                    .  Ex                            m                        m           ;         -                            Review Questions related to preceding content.

                        q    m                                             m                          ,

                                                                                    hemoglobinemia



                        H  m                                                                                                   CHAP  ER HIGHLIGH  S
                                  x                                       x   z           m      m  -                          Characteristics of Hemoglobin


                            .  T         m                     m       m
                             k                                                       ,     m      x   .                        ■   T                           m                      x                      k


                   H  m      x                m                                   m                                                                      m                         x                                    .
                    f      . H m     x   -    m                     m                                                          ■   N   m                 m             A


                              -                                           –                        (LRP/                                  M         '  L          I                 .. T
                   CD    ,    m                                         x                              ,                                                A/A.


                          , m                 /m              ,                      ). T                                      ■   A       m                  m                      m
                                         m                                   m                                                         m                              ;                               x m


                      x   -           m  .                                                                                                             .
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