Lymph vessel walls are very thin. Why?

Opportunistic infections are often the proximal (most direct) cause of death in individuals with immune systems that have been compromised. A) true B) false

27) In response to alerting cell activation, the B cell covers pathogens with ______________ to make recognition easier for the immune system. A) Antigens B) Toxoids C) Antibodies D) Immunoglobins

07. Which lymphatic structure is impossible to palpate? A) axillary nodes B) inguinal nodes C) thymus D) popliteal nodes?

The basis of all allergic responses lies with the production of ______ by _______. A) antibodies, T cells B) histamine, mast cells C) histamine, B cells D) complement, B cells

7. Which of these cells can activate both B & T lymphocytes? a) Helper T cells b) Plasma cells c) Cytotoxic T cells d) Neutrophils e) Mast cells 8. Which of the following happens when a B cell is activated? a) Inflammation b) The activated B cell differentiates into plasma cells and memory cells c) The B cell will suppress the immune response d) It acts as a phagocyte to engulf antigens e) The activated B cell will release haptens 9. How are T lymphocytes activated? a) Release of histamine during the inflammatory process triggers their activation b) By interferon and antibodies Contact with exposed collagen activates helper T cells d) Through direct contact with a foreign antigen e) Activation of any component of the nonspecific immune response will activate T cells 10. The variable region of an antibody c) ngang naging a) Binds to a specific epitope on an antigen. b) Can bind to several different antigens on the same bacterial cell. c) Binds to the first complement protein (C1). d) Is…

Interferon aims to protect cells against which of the following? 1) Intracellular bacteria 2) Helminth infection 3) Viral infections 4) Attack by immune complexes