Immune System Functions and Responses

The video tutorial explains the differences between cellular and humoral immunity. Cellular immunity involves T cells that destroy infected cells, while humoral immunity involves B cells that produce antibodies to fight pathogens. The video provides a detailed explanation of each process, including the roles of antigens, phagocytes, and memory cells. It concludes with a practice quiz for students to test their understanding.

What is the primary role of T cells in cellular immunity?

• To produce antibodies

• To destroy infected cells

• To engulf pathogens

• To activate B cells

What are antigens and where are they found?

• Carbohydrates found in the bloodstream

• Proteins found on the surface of cells and viruses

• Lipids found in the cell membrane

• Proteins found inside cells

How do phagocytes contribute to cellular immunity?

• By engulfing and displaying antigens of pathogens

• By producing antibodies

• By activating B cells

• By multiplying into memory cells

What is the function of memory T cells?

• To activate B cells

• To produce antibodies

• To remember pathogens for faster response in future infections

• To immediately destroy pathogens

What is the main function of B cells in humoral immunity?

• To activate T cells

• To engulf pathogens

• To produce antibodies

• To destroy infected cells

How do antibodies help in fighting infections?

• By activating T cells

• By producing more B cells

• By marking pathogens for destruction and preventing their spread

• By directly destroying pathogens

What is the role of helper T cells in humoral immunity?

• To activate B cells by releasing proteins

• To produce antibodies

• To engulf pathogens

• To destroy infected cells

What happens when B cells are activated?

• They activate phagocytes

• They produce memory T cells

• They engulf pathogens

• They multiply and produce antibodies

How do antibodies interfere with a pathogen's ability to infect cells?

• By activating T cells

• By destroying the pathogen

• By producing more antibodies

• By attaching to antigens and preventing infection

What is the significance of memory B cells?

• They activate T cells

• They produce antibodies

• They remember pathogens for faster response in future infections

• They immediately destroy pathogens