DHUB - week 9 Flashcards
(28 cards)
On physical examination, what characteristics would be apparent in a viral infection?
Tender, Mobile and soft Lymph nodes
What function is the Lymphatic system responsible for?
Elimination of toxins and waste
Recirculates proteins
Defends against microorganisms
What function does the spleen serve?
the site of the lymphocyte proliferation
Removal of damaged blood cells
T-cell maturation occurs in which lymphatic organ?
Thymus
Where is bone marrow located?
Within long bones
What cell is needed to activate B lymphocytes?
Helper T cells
Where are antigen-binding sites found
in variable segments of the antibody
What is an adaptive defence mechanism always activated by?
An antigen
What is the Lymphatic system?
net work of vessels part of the immune system which protects against infection and disease, nodes and lymphoid organs that collect, drain and filter interstitial fluid
What are the organs of the lymphatic system?
Lymph nodes
Lymphatic vessels
Bone marrow
Thymus gland
Tonsils
Spleen
Liver
What are the functions of the lymph nodes?
act as a filter for the lymph fluid and lymphocytes, removing bacteria, viruses and other foreign substances
Three main functions of the lymphatic system?
- to circulate and regulate fluid levels
Any axcess fluid that escapes from the blood stream is picked up by the lymphatic system and returned. This helps to prevent edema ( sweeling due to excess fluid) and keeps the fluid levels in the body and the blood stream with homeostasis.
- to absorb fats from the digestive system
Special lymph vessels are located in the lining of the digestive system where they are responsible for absorbing fat and fat-soluble vitamins from food. Th fats are then transported to the bloodstream and used as needed.
3. to defend the body against infection
The vessels of the lymphatic system move lymphatic fluid and lymphocytes throughout the body
What is Lymphedema?
condition caused by the build up of fluid in the tissues, resulting in swelling, commonly in the arms or legs
What cells make antibodies?
B cells
What is lymphoma?
Type of cancer of the lymphatic system, which can start anywhere in the body. Effecting B lymphocytes which is a verity of white blood cells, this begins when abnormal white blood cells are produced.
Antigen?
A substance that initiates an immune response
Pathogen?
disease creating organism
Phagocytosis
“cell eating” or engulfing cellular debris or foreign material
Phagocyte?
cell that performs phagocytosis
Antibody?
a protein produced by plasma cells that bonds to specific antigen and promotes its destruction
What are two physical barriers that contribute to the body’s defence?
Skin and mucous membrane
Describe 2 non-specific innate defence
Phagocytes removed cellular debris and forgein matter by engulfing and inflammation creates redness swelling heat pain
Four cell types that T cells differentiate into
T helper cells
Memory T cells
Plasma Cells
B cells
Difference between humoral immune response and the cell-mediated immune response.
Involves a reaction of circulating antibody and antigen and B lymphocytes which only recognize one epitope through a specific cell receptor
