18 Questions
Which of the following is a key feature of cell-mediated immune response?
Rejection of transplanted tissue
Which type of lymphocyte is responsible for cell-mediated immunity?
T-lymphocytes
What is the primary function of immunoglobulins (antibodies)?
Antigen recognition and elimination
What is the structure of a typical antibody molecule?
Two identical heavy chains and two identical light chains
Which type of lymphocyte is responsible for the production of antibodies?
B-lymphocytes
What is the primary difference between the primary and secondary antibody responses?
The secondary response is faster and produces more antibodies than the primary response.
What type of antibodies are the first antibodies produced in response to an antigen?
IgM
During the lag phase of a primary antibody response, what occurs?
No antibody production
What happens during the log phase of a primary antibody response?
Exponential increase in antibody levels
Which phase of the primary antibody response is characterized by a decline in antibody levels?
Decline phase
What is observed in the log phase of a secondary antibody response?
Rapid and higher increase in antibody levels compared to primary response
What differentiates memory cells from plasma cells during an immune response?
Memory cells persist for years and differentiate into plasma cells upon re-exposure
What is the primary antibody class produced in the first response to an antigen?
IgM
In newborns, which class of antibodies can pass through the placenta from the mother?
IgG
What type of immune response occurs when a person is infected for the first time?
IgM response followed by a delayed IgG response
What does the presence of IgG antibodies in a person's serum typically indicate?
A passed or second infection
When does the switch from IgM to IgG antibodies typically occur after initial exposure to an antigen?
Around 15-20 days after exposure
Which type of antibodies are primarily responsible for memory responses upon second exposure to an antigen?
IgG
Test your knowledge on the antibody response to antigens, including the production of IgM and IgG antibodies, primary and secondary responses, memory cells, and the decline of antibodies. Understand the differences between primary and secondary antibody responses.
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