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Lymphatic System
This category is for questions about the various vessels by which lymph, a watery fluid of leukocytes, circulates through the body, providing transportation for some materials and removing particulate from tissues.
1,658 Questions
What does the body perceive as an antigen?
Foreign organic or inorganic materials, such as viral/bacteria proteins, bacteria toxins, parasites membranes, foreign objects, etc. Incompatible blood or organs are perceived as antigenic as well, that's why they make all those compatibility tests before a transplant.
Process in which leukocytes are stained and counted?
The process you are referring to is known as a blood differential test or a white blood cell differential count. During this test, a blood sample is stained with special dyes to help differentiate between various types of white blood cells. These stained cells are then counted under a microscope to determine the relative percentages of each type of white blood cell present in the sample.
How is a problem with the immune system causing skin lesions diagnosed?
When involvement of the immune system is suspected, doctors may order a immunofluorescence test, which detects antibodies to specific antigens using a fluorescent chemical.
adaptive
What are some trade system regulations and restrictions?
Common trade system regulations and restrictions include tariffs, quotas, embargoes, exchange controls, and nontariff trade barriers
In BitTorrent, nodes refer to the individual computers or devices that participate in the peer-to-peer network for sharing files. Each node can act as both a client and a server, downloading pieces of files from other nodes while simultaneously uploading pieces to others. This decentralized structure enables efficient file distribution, as nodes collaborate to share data without relying on a central server. Nodes maintain a list of peers and use protocols to connect and exchange data, enhancing the speed and reliability of downloads.
Why do the lymph nodes in the back of my neck pop out at night?
It usually means that you are ill. You may just be tired when that happens, but check with you doctor.
When you have a cut on your finger that is infected what lymph nodes enlarge?
Either the few that are at your elbow or one of the many in your armpit.
B-lymphocytes express both MHC-1 and MHC-2?
Yes they do. MHC 1 are expressed by all nucleated calls (except neurones) and platelets. MHC 11 are expressed by B-cells, macrophages and dendtitic cells. Therefore, some cells express both types.
The jumping of an action potenial from node to node has been commonly called a what?
saltatory conduction
What causes the swelling of occipital lymph nodes?
Lymph nodes usually swell in response to a part of the body that is infected. Occipital lymph nodes that swell may be an indication that you have a certain infection of the scalp or other neighboring regions. These infections can be bacterial or viral in origin, but evidence also suggests that occipital nodes can swell when the scalp has a fungal infection.
Can depression lead to a weak immune system in adults?
Because studies are still investigating the effects of Depression there is not yet firm evidence to support or deny that this could happen. What those experts say is that the Depression does exist through chemical changes where some of those required to lift mood, reduce the survival reaction etc are not working effectively. There is a possibility that when the body, which is after all made up of chemicals finds that these chemicals are out of balance then there is sufficient reason to believe that other chemicals can be effected indirectly.
What three things does the lymphatic system do?
?: Returns fluid and protein in the circulatory system, takes fat and transfers it to the circulatory system and serves as a filter for pathogens
