Lymphatic System - ch. 22

_________ are actively phagocytic cells. 1. Macrophages 2. Neutrophils 3. Lymphocytes 1 only 2 only 3 only 1 and 2 1, 2 and 3

1 and 2

Which is NOT a function of antibodies? neutralize antigen. agglutinate or precipitate antigen. activate complement enhance phagocytosis. All of these choices are functions of antibodies

All of these choices are functions of antibodies

Which is NOT a function of the lymphatic system? carry out immune responses drain excess interstitial fluid transport dietary lipids all of these choices are functions of the lymphatic system none of these choices are functions of the lymphatic system

All of these choices are functions of the lymphatic system

Which of the following induces the production of a specific antibody? Phagocytosis Defensin Antibody Immunoglobulin Antigen

Antigen

Which of the following is considered a primary lymphoid organ? lymph node spleen bone marrow lymph node and spleen lymph node, spleen, and bone marrow

Bone marrow

The area drained by the thoracic duct is: lower extremities upper extremities upper right trunk, upper right limb and head lower right trunk, lower right limb, and right side of head and neck both lower limbs, lower trunk, left side of head and neck, left upper limb

Both lower limbs, lower trunk, left side of head and neck, left upper limb

Which of the following is not considered an antibody action to disable antigens? deactivates the complement system neutralizes bacterial toxins causes clumping of pathogens decreases motility of antigens activates phagocytosis

Deactivates the complement system

True or false. Actively acquired immunity only has memory if it is acquired naturally.

False

Which anti-microbial substances reduce viral replication (in uninfected cells)? Interferons Perforins Complement proteins Defensins Transferrins

Interferons

Which of these does NOT provide a physical or chemical barrier? Urine Stratified squamous epithelium Saliva Mucus Macrophages

Macrophages

A secondary invasion of an antigen may produce no signs or symptoms due to the action of: cytotoxic T cells helper T cells memory cells B cells plasma cells

Memory cells

Which of the following is not considered an organ of the immune system? Thymus Lymph node Red bone marrow Spleen Pancreas

Pancreas

The organ that is not a secondary lymphatic organ is? red bone marrow spleen lymphatic nodules lymph nodes

Red bone marrow

Which statement is true about immunological memory? the primary response is more powerful than the secondary cytotoxic T cells differentiate into memory cells upon a second exposure to an antigen the use of vaccinations is based on the concept of immunological memory there is an immediate rise in serum antibodies upon exposure to an antigen memory cells can survive up to several weeks

The use of vaccinations is based on the concept of immunological memory.

True or false. T cells cannot recognize and respond to a large polysaccharide molecule because the T cell antigen receptor can only bind to a small peptide bound to a self-MHC molecule.

True

True or false. While the processes of innate and adaptive immunity may interact or overlap, only adaptive immunity has the properties of specificity and memory.

True

Which organ produces a hormone that promotes maturation of T cells? Pancreas Lymph node Spleen Red bone marrow Thymus

e

Which antigen is not considered an exogenous antigen? bacteria pollen parasitic worms dust intracellular viruses

intracellular viruses

The lack of reactivity to the body's own proteins is known as: positive selection self-recognition deletion self-tolerance energy

self-tolerance

CD4 T cells acquire immunocompetence in the bone marrow. thymus. lymph nodes. spleen. peripheral blood.

thymus