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Grafts from just any source an animal, a...

Grafts from just any source an animal, another primate or any human being cannot be made since the grafts would be rejected by

A

B-cells

B

Cytotoxic T-cells

C

Helper T-cells

D

Suppressor T-cells

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding Grafts and Transplants**: Grafts refer to tissues or organs that are transplanted from one individual to another. This can be from the same species (autograft, isograft) or from a different species (xenograft). 2. **Immune Response**: When a graft is introduced into the body, the immune system recognizes it as foreign if the antigens on the graft cells differ from those of the recipient. The immune system is designed to protect the body from foreign invaders, including transplanted tissues. 3. **Role of Antigens**: Antigens are molecules that can trigger an immune response. If the antigens on the graft do not match those of the recipient, the body will identify the graft as a threat. 4. **Activation of T Cells**: Upon recognizing the graft as foreign, the immune system activates T cells. There are two main types involved: - **Cytotoxic T Cells**: These cells directly attack and destroy the foreign cells. - **T Helper Cells**: These cells assist in the immune response by activating B cells to produce antibodies against the foreign antigens. 5. **Outcome of the Immune Response**: The immune response leads to the rejection of the graft. The cytotoxic T cells will kill the graft cells, and the antibodies produced by B cells will further target the graft, leading to its failure. 6. **Conclusion**: Therefore, grafts from any source (animal, another primate, or any human being) cannot be made because the immune system will recognize them as foreign due to differing antigens and initiate a rejection process. **Final Answer**: Grafts from just any source cannot be made since the grafts would be rejected by cytotoxic T cells. ---
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