IMMUNITY Flashcards
State the definition of immune system, immunology, immunity, immune response.
Immune system= tissues, cells, and molecules that mediate resistance to infections
Immunology= study of structure and function of the immune system
immunity= ability of a host to resist or eliminate potentially harmful foreign materials or abnormal cell
Immune response= collective and coordinated response to the introduction of foreign substances in an individual mediated by the cells and molecules of the immune system
Explain the role of immune system
- Immune system is the cells, tissues and molecules that mediate resistance to infections by recognition and removal of the foreign molecules.
- It defence against microbes such as bacteria, viruses as well as parasites.
- It also defence against the growth of tumour cells by killing it.
- Lastly, it maintains the homeostasis by removing the worn out or dead cells from the body.
Definition of immune system
Immune system is cells, tissues, and molecules that mediates resistance to infections
Definition of immunity
Immunity is the ability of the host to resist or eliminate the foreign substances or abnormal cells.
Define immunology
Immunology is the study of structure and function of the immune system
Define immune response
Immune response is the collective and coordinated response that is caused by the cells and molecules of the immune systems towards the foreign substances
Give 5 examples of organs in immune system
- Appendix
- Spleen
- Lymphatic vessel
- Bone marrow
- Thymus
List 5 examples of cells in immune system.
- Macrophages
- Neutrophils
- B lymphocyte
- T lymphocyte
- Natural killer lymphocyte
List 3 examples of molecules in immune system
- Cytokines
- Interferons
- Antibodies
What is the type of immunity?
- innate immunity
- Adaptive immunity/ acquired immunity
List the difference between innate and acquired immunity.
INNATE IMMUNITY
- Rapid response
- Does not have memory
- Have wider range of microbes
- Present right from birth
- Exposure to antigen is not required
- Host cell receptors are non specific
ACQUIRED IMMUNITY
- slower response
- Does have memory
- Have specific microbes
- Acquired during the course of life
- Exposure to antigen is required
- Host cell receptors are specific
what is the example of first line of defense?
- Skin
- Mucous membrane
- Secretions
- Normal microbiota
What is the example of second line of defense?
- Macrophages
- Natural killer lymphocytes
- Neutrophils
- Inflammations
What is the example of third line of defense?
- Antibodies
- T cells
- B cells
