BIOC21H3 Study Guide - Lymphatic Vessel, Lymph Node, Mhc Class Ii

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16 Sep 2012

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Group of cells with mhc ii complexes on their surfaces to allow for lymphocyte stimulation. Antigen presentation is done by a specialized cell surface component mhc ii stimulate t- or b-lymphocyte activation. Mhc ii complexes only used to present what the cell has engulfed outside of itself once cell recognizes it, the cell will proliferate and produce. 1000s of lymphocytes that can recognize the antigen. Kupfer cells: specialized macrophages within the liver. Langerhan"s cells: found within skin (embedded in epidermis); migrate out of skin into lymph vessel and travel to nearest lymph node to activate. Disorganized tissue usually found underneath epithelium in contact with the outside world (e. g. , respiratory system, urinary system) Located at entry points into the body. Mucosal layer of gastrointestinal, respiratory and genitourinary tracts. Often subdivided into: galt gut. Ileum of the small intestine (peyer s patches) found in the exact same spot always. Divide into 1o and 2o nodules: primary nodules mostly composed of small lymphocytes.

Related Questions

2. The outermost layer of the human skin is called the __________. Dermis Fatty connective tissue Epidermis Ceruminous layer

3. The skin helps to protect the body from ultraviolet rays by ________________. A. Sweating B. Being flexible C. Using pigment - producing cells D. Being waterproof

4. Which of the following is NOT a protective function of the human skin? Protecting the body from chemicals Helping to regulate body temperature Protecting internal organs from abrasion Digesting external contaminants Creating a barrier between the body and ultraviolet rays from the sun

5. Which of the following is NOT an organ associated with the lymphatic system? Tonsils Spleen Pancreas Vermiform appendix Peyerâs patches

6. Tonsils ____________________. (Select all that apply) Are accessories of the integumentary system Are masses of lymphatic tissue embedded in mucous membranes Are regulated by the respiratory system Are frequently removed in a tonsillectomy Decrease in size as the body ages

7. During which stage of life are the lymphatic organs the most likely to be less functional and reduced in size? Infancy and Childhood Puberty Adulthood The size and function of the organs is not related to life stage

8. The two major groups of lymphocytes found in the body are the ___________. A lymphocytes and B lymphocytes Minor lymphocytes and Major lymphocytes B lymphocytes and C lymphocytes B lymphocytes and T lymphocytes

9. The organs associated with the Alimentary Canal share which similarity/similarities? They all belong to the lymphatic system They all belong to the gastrointestinal system Food does not pass directly through them during the process of digestion Food does pass directly through them during the process of digestion Both B and D

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c) Write notes on phagocytosis, complement,innate and adptive defenses,antigen presentation,clonal selection and antibodies

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Which of the following is a characteristic of the adaptive immune system?

a .It is a specific response against microbial antigen

b. It includes inflammation.

c. It activates the alternative complement pathway.

d. It includes defenses on the body surfaces.

2. C-reactive protein is an opsonin because it:

a. creates a channel in bacterial membranes

b. increases C3b binding to a microbe.

c. forms the pathogen-associated molecular patterns.

d. enhances phagocytosis.

3. The rapid increase in antibody production after repeated exposures to the same antigen is due to:

a. antibody-dependent cellular cytotoxicity.

b. higher levels of IgE

c. presence of memory cells.

d. clonal proliferation of NK cells

4. Cytotoxic T cells can kill cancer cells by:

a. inducing apoptosis with granzyme.b. release of membrane attack complex.

c. activate the production of complement C3b

d. phagocytosis of opsonized cells.

5. Which event is not required for the activation of helper T cells?

a. The presence of interleukin-1

b. Binding of CD8 receptors

c. Binding of matching non-antigenic proteins of the antigen-presenting cel

d. Presentation of an antigen bound to class II MHC

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BIOC21H3 Study Guide - Lymphatic Vessel, Lymph Node, Mhc Class Ii

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