Immunology 101

Which of the following is NOT a function of immunity?

Which of the following is NOT recognized and eliminated by the immune system?

What is the physiological function of immunity?

What is the meaning of 'immunity' in the context of the text?

Which of the following is a disadvantage of immunity?

Immunity is a physiological function of recognizing and eliminating the intruding ______

The physiologic function of immunity is defense against infectious ______

Immunity is a double-edged sword, and has advantages and ______

Defense against infection by stopping adhesion of ______ and ne.

Immunity acts as a defensive barrier to maintain the balance and stability of the inner environment of ______

General Introduction to Immunology

Pathogens are ubiquitous in the environment, posing constant threats to organisms.

Basic Concepts

Immunity Defined:
- Originates from "Immunitas" meaning freedom from civic responsibilities.
- Refers to the physiological processes that identify and eliminate foreign, antigenic substances.
- Functions to protect the internal environment of organisms, targeting pathogens, their toxic products, foreign proteins from plants and animals, as well as senescent and tumor cells.

Functions and Results of Immunity

Primary Functions:
- Defense Function: Protects against infectious agents by preventing pathogen adhesion and invasion.
- Homeostasis Function: Maintains balance of the internal environment, crucial for health.
- Surveillance Function: Monitors and identifies aberrant cells, such as cancerous cells, to eliminate them.
Dual Nature:
- Immunity acts as a double-edged sword, offering benefits while also posing potential risks.
  - Benefits: Effective defense and maintenance of internal stability.
  - Risks: Can lead to autoimmunity or excessive responses causing tissue damage.

Immune Homeostasis

In optimal conditions, the immune system functions to create equilibrium, balancing the elimination of threats while preserving healthy cells and tissues.

Test your knowledge of basic concepts in immunology, including the definition of immunity and its role in recognizing and eliminating antigenic materials. Explore the fascinating world of our body's defensive barrier against pathogens.