Humoral vs Cellular Immunity Flashcards

Questions and Answers

What is cellular (cell-mediated) immunity?

An immunity that solely relies on antibodies.

Specific defense that T lymphocytes directly attack and destroy diseased or foreign cells. (correct)

A type of immunity that does not involve T cells.

Specific defense that B lymphocytes produce antibodies.

With cellular immunity, the immune system does not remember the antigens.

False

What are the four classes of T cells used in cellular (cell-mediated) immunity?

Cytotoxic, helper, regulatory, and memory.

What are cytotoxic T cells commonly known as?

Killer T cells. Signup and view all the answers

Cytotoxic T cells are the 'effectors' of cellular immunity.

True Signup and view all the answers

What is the role of helper T cells in cellular immunity?

Help promote TC cell and B cell action and innate immunity. Signup and view all the answers

What do regulatory T cells do after a pathogen is defeated?

Inhibit cytotoxic T cell activity. Signup and view all the answers

Like Th cells, Tr cells can be called T4, CD4, CD4+.

True Signup and view all the answers

What are memory T cells responsible for?

Memory in cellular immunity. Signup and view all the answers

Which stages occur in both cellular and humoral immunity?

Recognition, attack, and memory. Signup and view all the answers

What are the three Rs of immunity?

Recognize, react, and remember. Signup and view all the answers

What is the main difference between cellular immunity and humoral immunity?

In humoral immunity, B cells produce antibodies after activation by free antigens; in cellular immunity, T cells attack infected body cells displaying antigens. Signup and view all the answers

Study Notes

Cellular Immunity Overview

Cellular immunity, also known as cell-mediated immunity, involves T lymphocytes attacking diseased or foreign cells directly.
This immune response retains memory of antigens, providing protection against future infections.

Types of T Cells

Four classes of T cells are crucial for cellular immunity:
- Cytotoxic T (Tc) cells: Known as killer T cells (also referred to as T8, CD8, or CD8+), these are the main effectors in cellular immune response.
- Helper T (Th) cells: These support the actions of both Tc cells and B cells, enhancing overall immune response.
- Regulatory T (Tr) cells (T-regs): After a pathogen’s defeat, they inhibit the activity of Tc cells to prevent overreaction.
- Memory T (Tm) cells: Derived from Tc cells, they are responsible for antigen-specific memory, allowing for quicker response upon re-exposure to pathogens.

Stages of Immunity

Both cellular and humoral immunity can be broken down into three stages:
- Recognition: Identifying the presence of antigens.
- Attack: The immune system actively responding to eliminate pathogens.
- Memory: Retaining information about the antigens for faster future responses.

Conceptualizing Immunity

The "three Rs of immunity" summarize the key stages in both cellular and humoral immunity:
- Recognize
- React
- Remember

Humoral vs. Cellular Immunity

The primary distinction lies in the type of cells involved:
- Humoral immunity: B cells produce antibodies in response to free antigens in body fluids.
- Cellular immunity: T cells target and attack infected body cells presenting pathogen antigens on their surfaces.

Description

Test your knowledge on humoral and cellular immunity with these flashcards. Learn about T lymphocytes, their roles in disease defense, and how the immune system remembers antigens to protect against future infections. Ideal for biology students looking to deepen their understanding of immune responses.