Specific Cellular Deffences Against Pathogens Flashcards
Which of the following white blood cells can develop into memory cells?
- Phagocyte
- B-Lymphocyte
- T-Lymphocyte
2 and 3
Which is the correct order to show how T-lymphocytes destroy pathogens?
- Proteins diffuse into infected cells
- T-lymphocytes attach to infected cells
3, Cell death - Production of self-destructive enzymes
2>1>4>3
How many types of lymphocytes are there?
2
Which correctly describes the function of a T-lymphocyte?
Recognises pathogen antigens on infected cells and induces apoptosis
What is present on the surface of lymphocytes?
Specific receptors
What cell is targeted by the Human immunodeficiency virus (HIV)?
T-lymphocytes
What is the generalised function that involves lymphocytes?
Specific immune responses
Which refer to the type of antigen and lymphocyte involved in autoimmunity?
- Self-antigens
- Non-self-antigens
- B lymphocytes
- T Lymphocytes
1 and 4
What is an allergic reaction?
Hypersensitive response by B-lymphocytes
What term describes the consequence of T-lymphocytes responding to self-antigens?
Autoimmunity
how do T-lymphocytes recognise help to fight disease?
Recognise pathogen antigens on body cells
What is apoptosis?
Programmed cell death
What do B-lymphocytes produce against antigens, leading to the destruction of the pathogen?
Antibodies
What term is used to describe programmed cell death?
Apoptosis
Which events occur during primary exposure to an antigen?
- Formation of memory cells occur
- Antibody production is greater
- Antibody production occurs much faster
1 only
Which cells are responsible for causing autoimmune diseases?
T-lymphocytes
What term describes a ‘hypersensitive response’ by B-lymphocytes?
Allergic reaction
What letter represents the shape of an antibody?
Y
Which events occur during primary exposure to an antigen?
- Formation of memory cells occur
- Antibody production is greater
- Antibody production occurs much faster
1 only
Which of the following are examples of autoimmune diseases?
- Type 1 Diabetes
- Type 2 Diabetes
- Rheumatoid arthritis
- Atherosclerosis
1 and 3
What is an allergic reaction?
Hypersensitive response by B-lymphocytes
What occurs as a response to an antigen binding to the specific receptors on a lymphocyte?
Repeated lymphocyte division forming a clonal population of identical lymphocytes
What is NOT a secondary response to an exposure of an antigen?
Memory cells are formed
Memory cells can rapidly give rise to a new clone of lymphocyte. This occurs . . .
After the secondary exposure to an antigen
