Immune class sys 4

Select the thymus in the diagram.

Label the Immune System. Drag and Drop the labels to the picture.

a

b

c

d

Thymus

Spleen

Bone Marrow

Tonsils

Macrophages and ​ (a)   are part of the ​ (b)   immune system. They carry out ​ (c)   , ​ (d)   also present ​ (e)   of the pathogens on their surface.

• neutrophils
• innate
• phagocytosis
• macrophages
• antigens
• adaptive
• antibody production
• antibodies

Which enzyme inside neutrophils is responsible for the destruction of ingested pathogens?

• Amylase

• Lysozyme

• Lipase

• Hexokinase

Answer explanation

Lysozyme is an enzyme that breaks down the cell walls of bacteria, effectively destroying ingested pathogens. It is found in various body fluids, including saliva and tears, making it crucial for immune defense.

What is the function of antigen-presenting cells in the cellular response?

• To produce antibodies

• To present antigens to T cells

• To destroy pathogens directly

• To transport nutrients

Answer explanation

Antigen-presenting cells (APCs) play a crucial role in the immune response by presenting antigens to T cells. This interaction is essential for T cell activation and the subsequent cellular response against pathogens.

How do helper T cells (TH cells) assist in the immune response?

• By producing antibodies

• By stimulating cytotoxic T cells, B cells, and phagocytes

• By engulfing pathogens

• By transporting oxygen

Answer explanation

Helper T cells (TH cells) assist the immune response by stimulating cytotoxic T cells, B cells, and phagocytes, enhancing their ability to fight infections. They do not produce antibodies or engulf pathogens.

Match the following

• It is a secondary lymphoid tissue

• Lymph nodes

• Produces white blood cells

• Thymus gland

• Trains T cells

• Bone marrow

• It is where old RBCs are removed

• Spleen

What does a mast cell do?

• Creates antibodies

• Eats other cells

• Remembers a pathogen

• Releases histamines

What attaches to antigens and tags the pathogen for destruction?

• Pathogen

• Antibodies

• B-cells

• Macrophages

Which type of immune cells destroys virally-infected cells?

• B-cells

• Eosinophil

• Cytotoxic T-lymphocyte

• Helper T-lymphocyte