2.6.2 The Immune System

• Lymph nodes filter lymph fluid and trap pathogens
• Which immune response is activated first upon pathogen detection?

  Innate immunity
• Innate immunity provides a non-specific, immediate response, while adaptive immunity is specific and delayed
• Adaptive immunity is activated after initial exposure to a pathogen.

  True
• The lymphatic system absorbs fat-soluble vitamins from the digestive system.


  True
• Phagocytes are responsible for the adaptive immune response.

  False
• Lymph nodes filter lymph fluid and trap pathogens.


  True
• What triggers adaptive immunity?

  Initial pathogen exposure
• Lymph contains white blood cells, waste products, and pathogens
• Phagocytes engulf and destroy pathogens through a process called phagocytosis
• IgG is the most abundant antibody class and provides long-term immunity
• Cellular memory results in faster and stronger antibody production
• The spleen recycles old red blood cells.


  True
• Arrange the components of the innate immune system in the order of their activation:

  1️⃣ Physical barriers

  2️⃣ Inflammatory response

  3️⃣ Phagocytes
• What are the main components of the second line of defense in the adaptive immune response?

  Antibodies, T-cells, memory cells
• What are the three main functions of the lymphatic system?

  Fluid balance, fat absorption, immune defense
• Which type of lymphocyte produces antibodies?

  B-cells
• What is the primary function of the immune system?

  Defense against pathogens
• What type of immune response is immediate and non-specific?

  Innate immunity
• The lymphatic system maintains fluid balance and supports the immune system.


  True
• What are the two main categories of white blood cells?

  Lymphocytes and phagocytes
• Match the antibody region with its function:

  Fab region ↔️ Antigen-binding sites

  Fc region ↔️ Interacts with immune cells
• Arrange the steps of phagocytosis in the correct order:

  1️⃣ Chemotaxis and Adherence

  2️⃣ Engulfment

  3️⃣ Formation of Phagosome

  4️⃣ Fusion with Lysosome

  5️⃣ Digestion

  6️⃣ Exocytosis
• What is the primary role of white blood cells in the immune system?

  Destroy foreign invaders
• Match the immune response with its characteristic:

  Innate Immunity ↔️ Non-specific, immediate response

  Adaptive Immunity ↔️ Specific, delayed response
• Innate and adaptive immunity work together to protect the body from infection.


  True
• Arrange the steps of adaptive immunity upon pathogen exposure:

  1️⃣ Pathogen detection

  2️⃣ Activation of T-cells

  3️⃣ Antibody production by B-cells

  4️⃣ Pathogen destruction
• Lymph nodes filter lymph and house immune cells
• Phagocytes destroy pathogens through a process called phagocytosis
• White blood cells are responsible for detecting and destroying foreign invaders
• Innate immunity is a non-specific, immediate response, while adaptive immunity is a specific, delayed response
• Arrange the components of the lymphatic system in order of their function:

  1️⃣ Lymph Vessels

  2️⃣ Lymph Nodes

  3️⃣ Lymph
• B-cells produce antibodies in the adaptive immune response.


  True
• What is the role of antibodies in neutralization?

  Prevent pathogen infection
• What are the two main types of cells involved in cellular memory?

  Memory B cells and memory T cells