Which Lymphoid Organ Filters Lymph?

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Which of the following is Not a role of the lymphatic arrangement?

Possible Answers:

Thymus and spleen

Os marrow

Liver

Adenoids and tonsils

Caption:

All of the following are parts of the lymphatic organisation, except the liver. The liver is considered to exist primarily a part of the digestive system.

Which of the post-obit are you lot near likely to discover in the medulla of a lymph node?

Possible Answers:

B-cells

T-cells

Stromal cells

Dendritic cells

Explanation:

In the lymph node, the B-cells are located in the cortex and the T-cells are located in the medulla. The stromal cells are structural cells that are not particular to an area of the lymph node. Dendritic cells will move through the lymph node to present antigens to the adaptive allowed system cells.

Which of the following is a primary lymphoid structure?

I. Thymus

II. Spleen

3. Lymph node

Possible Answers:

Ii and III

I, 2, and 3

I just

Iii simply

Explanation:

Primary lymphoid tissues refer to the tissues where lymphoid cells are generated, while secondary lymphoid tissues are the functional organs of the lymphatic arrangement.

Lymphocytes are generated and adult in the os marrow and thymus only. The spleen and lymph nodes are examples of secondary lymphatic organs.

Hypersensitivity reactions occur when body tissues are affected past an abnormal allowed reaction. The consequence is damage to normal tissues and clinical illness. A peanut allergy is an example of a hypersensitivity reaction, but there are 3 boosted broad classes.

One class involves the abnormal production or deposition of antibodies. Antibodies are B-jail cell derived molecules that normally attach to pathogens, rendering them unable to keep an infection. When antibodies are produced confronting normal tissues, even so, disease tin result. Effigy 1 depicts a schematic structure of an antibody.

Antibodies can be divided into two peptide chains: heavy and lite. Heavy chains form the courage of the antibiotic, and are attached to light chains via covalent bonding. Each heavy and low-cal concatenation is then further divided into abiding and variable regions. Variable regions exhibit molecular diverseness, generating a unique chemic identity for each antibody. These unique patterns help guarantee that the body can produce antibodies to recognize many possible molecular patterns on invading pathogens.

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Antibodies and antigens interact in secondary lymphoid tissue, such as the spleen. In add-on to its role in promoting this interaction, what is the main function of the spleen?

Possible Answers:

Synthesize new white blood cells

Secrete digestive enzymes

Synthesize most serum proteins

Secrete systemic hormones

Filter senescent cerise blood cells

Correct answer:

Filter senescent red blood cells

Explanation:

The spleen has 2 main functions. The first main office is immunological, while its second function is to filter unhealthy (senescent) red blood cells.

Most digestive enzymes are secreted past the pancreas into the small intestine. Systemic hormones come up from a variety of glands throughout the torso; the spleen does not take an endocrine office. White blood cells are synthesized in bone marrow and mature in the marrow and thymus. Serum proteins are synthesized in the liver.

Which of these is a lymphoid organ that is active in young children, but decreases in size and importance in machismo?

Possible Answers:

Tonsils

Lymph nodes

Spleen

Thymus

Adenoids

Explanation:

The thymus is a lymphoid organ located in the mediastinal space. The thymus is the site of T-lymphocyte differentiation. The mature T-cells leave the thymus and migrate to the spleen, lymph nodes, and other lymphoid tissues where they control prison cell-mediated immune responses. The thymus grows from birth to puberty, at which indicate it begins to shrink. The reason for this involution may be that the organ has produced plenty T-cells and is no longer necessary.

The spleen is another lymphocyte-producing organ. The spleen filters blood, exposing it to lymphocytes that destroy foreign particles. The size of the spleen remains abiding, except in cases of infections such equally mononucleosis. The tonsils are a patch of lymphoid tissue that contain lymphocytes located in the pharynx. The tonsils and adenoids grade a ring of immunologically agile tissue. These tissues remain at a constant size except when infected by bacteria. Lymph nodes receive lymph from a single organ or region of the body. An increase in size, known as lymphadenopathy, could result from combating infection or cancer.

Which lymphoid organ is the site of erythrocyte, leukocyte, and lymphocyte production?

Possible Answers:

Thymus

Spleen

Lymph nodes

Tonsils

Adenoids

Explanation:

The spleen forms erythrocytes (red blood cells), and leukocytes (white blood cells, including lymphocytes) during the embryonic phase. After birth, only lymphocytes are produced.

The tonsils and adenoids are patches of lymphoid tissue located in the pharynx that filter pathogens that enter the body through the oral cavity and olfactory organ. Lymph nodes produce lymphocytes in response to infections past pathogens. The thymus is an organ that produces lymphocytes in infants and immature children.

The surface of which lymphoid organ is covered with stratified squamous epithelium and located at the entrance to the oropharynx?

Possible Answers:

Thymus

Tonsils

Spleen

Lymph nodes

Adenoids

Explanation:

The surface of each tonsil is covered with stratified squamous epithelium, which forms deep crypts that detect and reply to pathogens entering the body. The tonsils are located on either side of the throat at the back of the tongue.

Adenoids are lymphoid tissue located in the nasopharynx, in the midline at the back of the throat. The spleen is in the upper left quadrant of the belly. The spleen has a smooth surface, every bit it is covered past an outer capsule of connective tissue. The thymus is in the mediastinum between the lungs. The thymus is equanimous of two lobes containing multiple lobules divided into an outer cortex and an inner medulla. The thymus is the site of T-cell differentiation. Lymph nodes filter lymph and remove foreign particles. Lymph nodes are located throughout the body, and are concentrated in the neck, axilla, and groin.

What lymphoid organ is one of the principal sites of cancer metastasis?

Possible Answers:

Lymph nodes

Thymus

Spleen

Adenoids

Tonsils

Correct answer:

Lymph nodes

Explanation:

Lymph nodes function to drain lymph. As lymph carries interstitial fluid, it also carries pathogens and cancer cells. Malignant cells may spread through the lymphatic apportionment.

Tonsils and adenoids are collections of lymphoid tissue in the pharynx that filter microbes that enter through the mouth and nose. They enlarge during infectious processes. The spleen filters blood, exposing it to macrophages and lymphocytes that destroy foreign particles and anile blood cells. The thymus is the primary site for T-cell differentiation. The mature T-cells exit the thymus and travel to the spleen, lymph nodes, and other lymphoid tissue where they command cell-mediated immune responses.

The lymphoid tissues are responsible for creating, storing, and processing lymphocytes, which are essentially the effector cells of the immune system. Which of the post-obit is a lymphoid construction that is also responsible for recycling one-time ruby blood cells?

Possible Answers:

Spleen

Liver

Thymus

Appendix

Bone marrow

Explanation:

The spleen is a lymphoid structure that contains resident lymphocytes that produce antiobodies, besides as T-cells that are released into the bloodstream. It also contains resident macrophages, which are responsible for removing and degrading microbes and worn-out scarlet blood cells.

Destruction of the lymph nodes would most likely touch on the allowed system in which way?

Possible Answers:

Inability to initiate and sustain an inflammatory response at the site of infection

Inability to produce killer T cells

Inability to bind antibodies to an antigen

Inability to carry out a 2nd response to an antigen significantly shorter in duration than the first

Correct respond:

Disability to conduct out a 2nd response to an antigen significantly shorter in duration than the first

Explanation:

The secondary response of the immune system is significantly shorter in elapsing due to the storage of memory cells after the initial infection has been combated. During the chief infection, a B-cell will bind with an antigen. In one case this occurs, the B-cells will begin to divide rapidly into plasma cells and memory cells. Plasma cells release high quantities of antibodies, which are integral in combating the infection. Retentivity cells are stored in lymph nodes so that if the same antigen is always encountered again, information technology can exist quickly dealt with by a fast-responding product of the correct form of plasma jail cell. If lymph nodes were destroyed, memory cells would non exist able to mount this quick secondary response.

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