Select the best answer or answers from the choices given: Which of the following is not involved in the activation of a B cell? (a) antigen, (b) helper T cell, (c) cytokine, (d) cytotoxic T cell.
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A:
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Select the best answer or answers from the choices given: Which of the following is not involved in the activation of a B cell? (a) antigen, (b) helper T cell, (c) cytokine, (d) cytotoxic T cell.
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- Dendritic cells must present antigen to both B cells and T cells in order to activate them True or false?Select the best answer or answers from the choices given: The cell type most often invaded by HIV is a(n) (a) eosinophil, (b) cytotoxic T cell, (c) natural killer cell, (d) helper T cell, (e) B cell.For question with blanks, choose the combination of answers that most accurately completes the statement.Helper T cells receive antigen from.......... , and cytotoxic T cells receive antigen from............. a. macrophages, B cells b. class II MHC, class I MHC c. viruses, bacteria d. class I MHC, class II MHC
- Which T-lymphocytes activate the B-cell response? 1- suppressor T-cells. 2- cytotoxic T-cells. 3- helper T-cells. 4- memory T-cells.which of the following cells secrete cytokines that activate B cells, T cells, and macrophages? a. T helper cells b. regulatory T cells c. T cytotoxic cells d. dendritic cellsAlthough we lumped all lymphocytes together (normal and unusually large ones), what is the correct name for the large (activated) B-lymphocytes that are producing antibodies?
- What type of B cell would interact with a T cell and what would result from the interactionWhich of these statements about complement proteins C3a and C5a is false?a. They are released during the complement fixation process.b. They stimulate chemotaxis of phagocytic cells.c. They promote the activity of phagocytic cells.d.They produce pores in the victim plasma membrane.Due to the presence of breast cancer, Mrs. Franco had a right radical mastectomy in which her right breast, underlying muscle, and right axillary lymph nodes and vessels were removed. Now she is experiencing severe swelling in her right arm. Why did the surgeon remove lymph tissue as well as the breast? Why is Mrs. Franco’s right arm swollen?
- After his recovery from chickenpox, which lymphocytes will keep this patient from becoming infected again? A) T helper cells B) Natural killer cells C) T memory cells D) B cellsSelect the best answer or answers from the choices given: Antibodies released by plasma cells are involved in (a) humoral immunity, (b) immediate hypersensitivity reactions, (c) autoimmune disorders, (d) all of the above.Jordan has an enlarged lymph node along the side of his neck,and he is worried that the structure may be a lymphoma. Whatare some criteria to help distinguish between infected lymphnodes and malignant lymph nodes? If the lymph node werecancerous, how would a physician determine if the cancer hasspread to other parts of the body?