The Immune System MCAT Questions and Answers | Latest Update | 2024/2025 | 100% Verified
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Course
The Immune System MCAT
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The Immune System MCAT
The Immune System MCAT Questions
and Answers | Latest Update | 2024/2025
| 100% Verified
What is the role of macrophages in the immune response?
Macrophages are phagocytic cells that engulf and digest pathogens, dead cells, and cellular
debris, and they also present antigens to T cells t...
The Immune System MCAT Questions
and Answers | Latest Update | 2024/2025
| 100% Verified
What is the role of macrophages in the immune response?
✔✔Macrophages are phagocytic cells that engulf and digest pathogens, dead cells, and cellular
debris, and they also present antigens to T cells to initiate an adaptive immune response.
Describe the function of T helper cells (CD4+ cells) in the immune system.
✔✔T helper cells activate and coordinate the immune response by releasing cytokines that
stimulate the activity of other immune cells, including B cells and cytotoxic T cells.
How do cytotoxic T cells (CD8+ cells) eliminate infected cells?
✔✔Cytotoxic T cells recognize and bind to infected cells displaying foreign antigens and release
perforins and granzymes that induce apoptosis in the target cells.
1
, What is the role of B cells in humoral immunity?
✔✔B cells produce antibodies that bind to specific antigens, neutralizing pathogens and marking
them for destruction by other immune cells.
Explain the process of clonal selection in the adaptive immune system.
✔✔Clonal selection occurs when an antigen binds to a specific B or T cell, stimulating that cell
to proliferate and differentiate into a clone of effector and memory cells that target the same
antigen.
How do natural killer (NK) cells contribute to immune defense?
✔✔Natural killer (NK) cells recognize and kill virus-infected cells and cancer cells by releasing
cytotoxic molecules, without the need for prior antigen exposure.
What is the function of the major histocompatibility complex (MHC) in immune recognition?
2
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