20 Questions
What is the main function of the immune system?
Protecting multicellular organisms
How are effector responses different from memory responses in the immune system?
Effector responses eliminate invaders
What is the role of memory cells in the immune system?
Remaining dormant until a second encounter with antigen
How does the immune system differentiate between foreign invaders and host cells?
Based on molecular patterns
What is the significance of plasma cells in the immune system?
Producing antibodies for defense
Which type of antigen binds specifically to antibodies?
Haptens
What is a characteristic of Heterophils antigens?
Identical antigens in unrelated organisms
Which of the following is an example of a Hapten?
Benzylpenicillic acid
What is the nature of Isoantigens?
Blood group antigens
Which type of antigen has a molecular weight of less than 10,000?
Drug - Benzylpenicillic acid
Why does a homopolymer polypeptide chain fail to induce an immune response?
Due to its chemical composition and heterogeneity
Which factor is NOT mentioned as influencing the Immunogenicity of an antigen?
Molecular Weight
What is the main characteristic of INNATE IMMUNITY as described in the text?
Non-specificity
Which type of immunity relies on humoral/circulating mechanisms?
Adaptive Immunity
What is the term used in the text to describe 'a state of unresponsiveness towards self antigens'?
Immunotolerance
Why do substances with a molecular weight around 100000 Daltons show the best immunogenicity?
Their large size helps in identification and phagocytosis by APCs
Why do synthetic lysine and glutamic acid co-polymers seem to be less immunogenic compared to when tyrosine is added?
The addition of other amino acids increases complexity
How do proteins like insulin and histone with low molecular weight fail to produce proper immunological responses?
They lack hidden epitopes for immune response
Why are antigens from related species less antigenic than those from unrelated species?
They lack foreignness
What role does antigen presentation to T helper cells through Antigen Presenting Cells (APCs) play in immune responses?
It is crucial for both humoral and cell-mediated immune responses
This quiz covers the concept of immunity, the immune system's role in protecting organisms, immune responses to foreign agents, immune recognition, and how the system differentiates between pathogens and self components.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
