ATI RN
Immune System Multiple Choice Questions Questions
Question 1 of 5
In patients with lymphomas, the cancer cells invade the bone marrow and destroy the environment required for normal hematopoiesis. This leads to bone marrow failure, which disrupts the production of hematopoietic cell lineages. All of the following cell types would be affected by this EXCEPT:
Correct Answer: D
Rationale: Bone marrow failure affects hematopoietic cells (A, B, C, E) derived from stem cells; endothelial cells are non-hematopoietic and unaffected.
Question 2 of 5
One striking feature of TCR interactions with peptide:MHC complexes is that amino acid residues in the MHC protein are as important to the TCR binding strength as are amino acid residues in the pathogen-derived peptide. This feature is in contrast to antigen recognition by antibodies, which is a direct interaction that is independent of other host proteins. Based on the different functions of T cells versus antibodies in the adaptive immune response, the fact that TCRs recognize components of both the MHC and the bound peptide exists to:
Correct Answer: D
Rationale: TCR-MHC recognition targets cell-associated antigens ; not just evasion or constraints , antibodies handle free antigens.
Question 3 of 5
Tropism is a phenomenon by which
Correct Answer: A
Rationale: Tropism refers to plant growth responses to stimuli (e.g., light or gravity), not branching or day/night length, which relate to other processes like photoperiodism.
Question 4 of 5
The human lymphatic system consists of all of the following structures except the
Correct Answer: D
Rationale: The pancreas is not part of the lymphatic system, which includes thymus, tonsils, and spleen for immune functions.
Question 5 of 5
What type of cell helps to stimulate B cells to produce antibodies?
Correct Answer: C
Rationale: Helper T cells activate B cells via cytokines, enhancing antibody production, unlike plasma cells (antibody producers), cytotoxic T cells, or macrophages.