1) Describe the Functions of T Cells, B Cells, Macrophages, and Dendritic Cells

BIOL 255 SI, Molly

Unit 4D, 11/9/16

1) Describe the functions of T cells, B cells, macrophages, and dendritic cells.

2) Lymph nodes are embedded in the parietal and visceral______. The parietal lymph nodes are found in the ______membrane and the visceral lymph nodes are found in the______.

3) The functions of the lymph nodes are ______of macrophages, which destroy microorganisms and debris entering via the ______lymphatic vessels, and ______system activation which monitor for ______and initiate their removal.

4) Lymph nodes have two distinct regions: the ______, which is the outer region, and the ______, which is the inner region. The cortex contains follicles with ______centers where you find ______B cells and ______cells. Housed deep within the cortex are ______cells in transit. These T cells circulate continuously surveying______, lymph ______, and the lymphatic stream.

5) The medullary cords extend from the cortex and contain ___cells, ___cells, and ______cells. The lymph sinuses are crisscrossed by ______fibers throughout the node where ______reside.

6) Circulation in the lymph node where the lymph is ______has the lymph entering via the ______lymphatic vessels, where it stagnates so the lymphocytes and ______have time to carry out their ______functions, and exits the node at the ______via the ______vessels.

7) The spleen, which is the ______lymphoid organ, functions are the site of ______proliferation, ______surveillance and response (white pulp area), cleansing of the______, storage and break-down of old RBC’s (referred to as______), storage of______for later use by bone marrow, site of fetal ______production which normally ceases after birth, and storage of blood ______(red pulp area).

8) The thymus secrets the hormones ______and ______which are required to mature T lymphocytes to become______. The thymus does not directly fight ______.Iits function is to ______T lymphocytes.

9) MALT or ______-______are found in the ______of mucosa membranes of the ______and ______tracts, which protect these systems from foreign matter.

10) The tonsils are the ______lymphoid organs, which contain ______with germinal centers that are not fully______. Epithelial tissue overlying the tonsil masses invaginates (in foldings) which form blind-end______, which trap and ______bacteria.

11) Aggregates of lymphoid follicles are ______Patches which are isolated clusters of ______tissues, similar to tonsils found on the walls of the small ______and appendix. Their functions are to ______bacteria, preventing them from breaching the intestinal wall, and generate “memory” ______for long term______.

12) Lymphatic organs arise from the ______, except the thymus which is ______in origin.Other than the spleen and the tonsils, lymphoid organs are poorly ______at birth.

Courtesy: mbmadsen