1 Blood Flashcards
What do Red blood cells do?
Transport of oxygen
What is the role of White Blood Cells?
Immune defence
Role of platelets?
Clotting + healing of a wound
Role of plasma?
Carry water, fluid of the blood, plasma protein and hormones
- the medium of blood
What is the role of Neutrophils?
Phagocytosis of foreign substances
- destruction of infected cells
What is the role of Eosinophils?
- Involved in the dampening of immune reaction after peak
- Also involved in allergic + asthma
- Defence against parasites
What is the role of Basophils
- Release of vasoactive substances (similar to mast cells)
- Participation in allergic reactions and asthma
What is the role of Lymphocytes?
- Specific immune system (T cells)
- Develop into antibody-producing Plasma cells or memory cells (B cells)
What is the role of Monocytes?
- Circulating ‘reserve’ macrophages
- Main phagocytic cells in the body
What is innate immunity?
Innate immune system:
- limited specificity, cells with great destructive power
They have a destructive capacity
- BUT specificity towards a large variety of pathogens limited
What cells are involved in innate immunity?
Cells include (secreted immune mediators)
- Granulocytes
- Macrophages
- Natural Killer cells
- Mast cell
Describe the acquired immune system
Acquired immune system
- Lymphocytes (key cell) identify invading pathogen with a greater specificity
- and organise a response + bundle destructive actions of other cells to much greater efficacy of response
Why is the acquired immune system more specific?
Specificity is achieved by:
- having millions of different variants of lymphocytes
- and antibodies tag pathogen with high specificity
- and mark it for attack by the innate system,
What cells are involved in the acquired immune system,?
Cells include:
- Lymphocytes - B and T (which proliferate into)
- B memory, B plasma cells
- T killer (cytotoxic) cells, T helper cells, T regulatory cells
