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Antigen Receptors and Activation of T and B Cells

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Antigen Receptors and Activation of T and B Cells

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Questions and Answers

What is the role of T cell receptor (TCR) and B cell receptor (BCR) on T and B cells, respectively?

They produce antibodies against antigens

They help in antigen presentation

They assist in immune response initiation

They carry antigen receptors on their surface (correct)

Why does random rearrangement of genes for the variable region of receptor molecules occur?

To increase the rate of antigen uptake

To produce receptors with a wide range of antigen binding sites (correct)

To induce apoptosis in lymphocytes

To decrease the specificity of T and B cells

How is an immune response initiated in T cells?

By exposure to cytokines

By contact with antigen presenting cells (APCs) (correct)

By interaction with B cells only

By direct activation through antigens

What happens when an antigen is taken up by an antigen presenting cell (APC)?

It is broken down into short peptides Signup and view all the answers

In T cells, which type of MHC-peptide complex induces a T helper cell (TH) response?

Class II MHC-peptide complex Signup and view all the answers

What is the outcome of an antigenic peptide being presented to T cells via MHC class II molecules?

Induction of a T helper cell response Signup and view all the answers

When is activation of B or cytotoxic T cells mediated by a variety of interleukins?

When B cell receptors bind to the antigen Signup and view all the answers

How do cytotoxic T cells recognize antigens presented on an infected cell's membrane?

By binding to class I MHC proteins Signup and view all the answers

What is required for a TC response to be mounted when antigen is synthesized within a body cell?

Activation of TH cells Signup and view all the answers

How do B lymphocytes recognize unprocessed antigens?

Recognition by the BCR (surface immunoglobulin, sIg) Signup and view all the answers

What happens when antibodies bind to viral surface antigens according to the text?

Activation of complement Signup and view all the answers

Which mechanism leads to the destruction of abnormal cells through apoptosis?

Cell-mediated cytotoxicity by cytotoxic T cells and NK cells Signup and view all the answers

Antigen Receptors and Activation of T and B Cells

Choose a study mode

Podcast

Questions and Answers

What is the role of T cell receptor (TCR) and B cell receptor (BCR) on T and B cells, respectively?

Why does random rearrangement of genes for the variable region of receptor molecules occur?

How is an immune response initiated in T cells?

What happens when an antigen is taken up by an antigen presenting cell (APC)?

In T cells, which type of MHC-peptide complex induces a T helper cell (TH) response?

What is the outcome of an antigenic peptide being presented to T cells via MHC class II molecules?

When is activation of B or cytotoxic T cells mediated by a variety of interleukins?

How do cytotoxic T cells recognize antigens presented on an infected cell's membrane?

What is required for a TC response to be mounted when antigen is synthesized within a body cell?

How do B lymphocytes recognize unprocessed antigens?

What happens when antibodies bind to viral surface antigens according to the text?

Which mechanism leads to the destruction of abnormal cells through apoptosis?

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Upgrade to continue

Antigen Receptors and Activation of T and B Cells

Choose a study mode

Podcast

Questions and Answers

What is the role of T cell receptor (TCR) and B cell receptor (BCR) on T and B cells, respectively?

Why does random rearrangement of genes for the variable region of receptor molecules occur?

How is an immune response initiated in T cells?

What happens when an antigen is taken up by an antigen presenting cell (APC)?

In T cells, which type of MHC-peptide complex induces a T helper cell (TH) response?

What is the outcome of an antigenic peptide being presented to T cells via MHC class II molecules?

When is activation of B or cytotoxic T cells mediated by a variety of interleukins?

How do cytotoxic T cells recognize antigens presented on an infected cell's membrane?

What is required for a TC response to be mounted when antigen is synthesized within a body cell?

How do B lymphocytes recognize unprocessed antigens?

What happens when antibodies bind to viral surface antigens according to the text?

Which mechanism leads to the destruction of abnormal cells through apoptosis?

More Like This

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