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Biology

Visual Connection Questions

BiologyVisual Connection Questions
1.

Figure 42.11 Which of the following statements about T cells is false?

  1. Helper T cells release cytokines while cytotoxic T cells kill the infected cell.
  2. Helper T cells are CD4+, while cytotoxic T cells are CD8+.
  3. MHC II is a receptor found on most body cells, while MHC I is a receptor found on immune cells only.
  4. The T cell receptor is found on both CD4+ and CD8+ T cells.
2.

Figure 42.14 Based on what you know about MHC receptors, why do you think an organ transplanted from an incompatible donor to a recipient will be rejected?

3.

Figure 42.16 The Rh antigen is found on Rh-positive red blood cells. An Rh-negative female can usually carry an Rh-positive fetus to term without difficulty. However, if she has a second Rh-positive fetus, her body may launch an immune attack that causes hemolytic disease of the newborn. Why do you think hemolytic disease is only a problem during the second or subsequent pregnancies?

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