helper t t h cells recognize antigens when they are bound to an group of answer choices mhc ii

1. Identify the type of antigen that is being recognized.

Helper t t h cells recognize antigens when they are bound to...

Helper T (T H) cells recognize antigens when they are bound to a(n) __________. MHC II surface protein natural killer cell MHC I surface protein antibody as opposed to a primary response a secondary response is higher and faster slower and smaller higher but slower fast and smaller B cells that activate during an initial immune response but remain dormant until being activated during a second exposure to an antigen are called monocytes. T cells. cytokines. macrophages. memory cells. Which of the following cells of the immune system are capable of phagocytosis? (choose all that apply) Dendritic cells Macrophages Natural Killer Cells Helper T cells Neutrophils A decrease in which lymphocytes would decrease response from all parts of an adaptive immune response? B lymphocytes cytotoxic T cells helper T cells plasma cells

Transcript

00:01 Hello students, let us answer these given questions one by one.

00:06 The correct answer for the first question is option a, mhc ii surface proteins.

00:15 Mhc ii surface proteins.

00:20 This is the correct answer because the helper t cells recognize antigens when they are bound to mhc ii surface proteins.

00:31 The mhc ii proteins are found on the surface of antigens presenting cells such as macrophages, dendric cells and b cells.

00:43 These proteins play a crucial role in presenting the antigens to the th cells which then activate and coordinate the immune response.

00:55 The answer for the second question is option a, higher and faster.

01:00 This is the right answer because a secondary response in the immune system is higher and faster compared to the primary response.

01:10 This is because during a primary response, the immune system is encountering the antigen for the first time and it takes some time for the immune cells to recognize, respond and mount an effective defense.

01:24 However, during a secondary response, the memory cells that were generated from the primary response are already present and these memory cells can quickly recognize the antigen upon re -exposure and mount a faster and stronger immune response.

01:44 The answer for the third question is option e, memory cells.

01:50 Option e, memory cells.

01:53 This is because the b cells that activate during an initial immune response but they remain dormant until being activated during a secondary exposure to an antigen and are called as memory cells.

02:09 Memory cells are a type of b cells that remember the specific antigen they encountered during the initial immune response and when they are re -exposed to the same antigen, these memory cells quickly activate and differentiate into plasma cells which produce antibodies to fight against the antigen...

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