SH Practical - Lymphatic Quiz: Difference between revisions
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{Lymph is carried towards an lymph node by: | {Lymph is carried towards an lymph node by: | ||
|type="()"} | |type="()"} | ||
+ afferent lymph vessels | + afferent lymph vessels | ||
|| Yup. | || Yup. | ||
- efferent lymph vessels | - efferent lymph vessels | ||
|| Nope. But remember these terms are a functional description relative to the vessel for that specific node. In a chain, the efferent vessel from one node can become the afferent lymph vessel of the next node. | || Nope. But remember these terms are a functional description relative to the vessel for that specific node. In a chain, the efferent vessel from one node can become the afferent lymph vessel of the next node. | ||
{The most abundant white blood cells as a percentage of all cells in normal circulation are the | {The most abundant white blood cells as a percentage of all cells in normal circulation are the | ||
|type="()"} | |type="()"} | ||
- lymphocytes | - lymphocytes | ||
- basophils | - basophils | ||
- monocytes | - monocytes | ||
- eosinophils | - eosinophils | ||
+ neutrophils | + neutrophils | ||
|| Neutrophils, of course. Here they are in order from the table in the practical class: 60% neutrophils (50% - 70%) 30% lymphocytes (20% - 40%) 3% eosinophils (>0% - 5%) 5% monocytes (1% - 9%) 0.5% basophils (>0% - 2%) | || Neutrophils, of course. Here they are in order from the table in the practical class: 60% neutrophils (50% - 70%) 30% lymphocytes (20% - 40%) 3% eosinophils (>0% - 5%) 5% monocytes (1% - 9%) 0.5% basophils (>0% - 2%) | ||
{[[File:Plasma_cell_EM06.jpg|100px]] Why does this lymphocyte shown in this EM contain lots of RER? | {[[File:Plasma_cell_EM06.jpg|100px]] Why does this lymphocyte shown in this EM contain lots of RER? | ||
|type="[]"} | |type="[]"} | ||
- Because its a cytotoxic T lymphocyte | - Because its a cytotoxic T lymphocyte | ||
|| T lymphocytes have mainly free ribosomes, not attached to endoplasmic reticulum. | || T lymphocytes have mainly free ribosomes, not attached to endoplasmic reticulum. | ||
- Because its a monocyte | - Because its a monocyte | ||
|| This is not even a lymphocyte. This is the circulating form of a tissue macrophage. | || This is not even a lymphocyte. This is the circulating form of a tissue macrophage. | ||
- Because its a macrophage | - Because its a macrophage | ||
+ Because its a Plasma cell | + Because its a Plasma cell | ||
|| Yes plasma cells are actively secreting antibody by therefore ribosomes attach to the endoplasmic reticulum as the first step in the exocytosis pathway. | || Yes plasma cells are actively secreting antibody by therefore ribosomes attach to the endoplasmic reticulum as the first step in the exocytosis pathway. | ||
+ Because its a B lymphocyte | + Because its a B lymphocyte | ||
|| Well it is also a B lymphocyte, just in its "activated" form (plasma cell, plasmocyte or effector B cell). | || Well it is also a B lymphocyte, just in its "activated" form (plasma cell, plasmocyte or effector B cell). | ||
{In normal peripheral blood which the most abundant lymphocyte cell type? | {In normal peripheral blood which the most abundant lymphocyte cell type? | ||
|type="()"} | |type="()"} | ||
+ T cells | + T cells | ||
|| 60 - 80% of lymphocytes are T cells. 50/50 Questions are far to easy...... | || 60 - 80% of lymphocytes are T cells. 50/50 Questions are far to easy...... | ||
- B cells | - B cells | ||
|| 10 - 15% are B cells, the remainder lack both B and T cell markers (Natural killer cells, null cells). | || 10 - 15% are B cells, the remainder lack both B and T cell markers (Natural killer cells, null cells). | ||
{Reticular fibres are composed of type III collagen and secreted by reticular cells. Which of the following statements are correct about reticular fibres? | {Reticular fibres are composed of type III collagen and secreted by reticular cells. Which of the following statements are correct about reticular fibres? | ||
|type="[]"} | |type="[]"} | ||
+ Reticular fibres are very delicate and form fine networks instead of thick bundles. | + Reticular fibres are very delicate and form fine networks instead of thick bundles. | ||
|| These fibres are present in many different connective tissues, but are not easily identified in most histological stains. Note the alternate American spelling reticular fiber. | || These fibres are present in many different connective tissues, but are not easily identified in most histological stains. Note the alternate American spelling reticular fiber. | ||
+ Reticular fibres give support to individual cells. | + Reticular fibres give support to individual cells. | ||
|| Their dimensions and distribution allow then to support cells in tissues. | || Their dimensions and distribution allow then to support cells in tissues. | ||
+ Reticular fibres stain black in silver stained preparations. | + Reticular fibres stain black in silver stained preparations. | ||
|| [[Histology_Stains#Silver_Stain|Silver Stain]] is the stain for these argyrophilic ("silver loving") reticular fibres. | || [[Histology_Stains#Silver_Stain|Silver Stain]] is the stain for these argyrophilic ("silver loving") reticular fibres. | ||
+ Reticular fibres form open meshwork's allowing the exchange of substances and cell movement. | + Reticular fibres form open meshwork's allowing the exchange of substances and cell movement. | ||
|| [[:File:Spleen_histology_04.jpg|Spleen reticular fibres]] show cords supporting cells and also lining the blood sinuses. | || [[:File:Spleen_histology_04.jpg|Spleen reticular fibres]] show cords supporting cells and also lining the blood sinuses. | ||
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{[[File:Spleen_histology_08.jpg|600px]]<br>Which of the following best describes the spleen histology and feature shown in the above histological image? | {[[File:Spleen_histology_08.jpg|600px]]<br>Which of the following best describes the spleen histology and feature shown in the above histological image? | ||
|type="()"} | |type="()"} | ||
+ Spleen white pulp germinal centre | + Spleen white pulp germinal centre | ||
|| Yes! [[:File:Spleen histology 06.jpg|here is white and red pulp]] shown together. | || Yes! [[:File:Spleen histology 06.jpg|here is white and red pulp]] shown together. | ||
- Spleen red pulp splenic sinuses | - Spleen red pulp splenic sinuses | ||
|| No. [[:File:Spleen_histology_07.jpg|This is what red pulp looks like]] | || No. [[:File:Spleen_histology_07.jpg|This is what red pulp looks like]] | ||
- Spleen reticular fibres and sinuses | - Spleen reticular fibres and sinuses | ||
|| No, well sinuses may be in the edges of the image, and reticular fibres are not even identifiable. Did you answer the reticular fibre question correctly? Here is an [[:File:Spleen_histology_09.jpg|image of reticular fibres]] stained in the white and red pulp. | || No, well sinuses may be in the edges of the image, and reticular fibres are not even identifiable. Did you answer the reticular fibre question correctly? Here is an [[:File:Spleen_histology_09.jpg|image of reticular fibres]] stained in the white and red pulp. | ||
- Its not spleen at all, but a lymph node follicle. | - Its not spleen at all, but a lymph node follicle. | ||
|| Well no, I did say it was spleen. This is what a [[:File:Lymph node histology 02.jpg|follicle]] looks like, though they also have [[:File:Lymph_node_histology_03.jpg|germinal centres]]. | || Well no, I did say it was spleen. This is what a [[:File:Lymph node histology 02.jpg|follicle]] looks like, though they also have [[:File:Lymph_node_histology_03.jpg|germinal centres]]. | ||
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{Which of the following sequences best describes the pathway of lymph fluid through a lymph node | {Which of the following sequences best describes the pathway of lymph fluid through a lymph node | ||
|type="()"} | |type="()"} | ||
+ Subcapsular sinus -> Paratrabecular sinus -> Medullary sinus -> Efferent vessel | + Subcapsular sinus -> Paratrabecular sinus -> Medullary sinus -> Efferent vessel | ||
- Subcapsular sinus -> Paratrabecular sinus -> Medullary sinus -> Afferent vessel | - Subcapsular sinus -> Paratrabecular sinus -> Medullary sinus -> Afferent vessel | ||
- Subcapsular sinus -> High endothelial venule -> Medullary sinus -> Thoracic duct | - Subcapsular sinus -> High endothelial venule -> Medullary sinus -> Thoracic duct | ||
- Subcapsular sinus -> Medullary sinus -> Paratrabecular sinus -> Hilum vessel | - Subcapsular sinus -> Medullary sinus -> Paratrabecular sinus -> Hilum vessel | ||
{[[File:Lymph_node_histology_05.jpg|200px]]<br>Which of the following descriptions best describes the function of High endothelial venules? | {[[File:Lymph_node_histology_05.jpg|200px]]<br>Which of the following descriptions best describes the function of High endothelial venules? | ||
|type="()"} | |type="()"} | ||
- Act as a site for the distribution of macrophages in lymph nodes | - Act as a site for the distribution of macrophages in lymph nodes | ||
- Drain lymph fluid from secondary lymph organs | - Drain lymph fluid from secondary lymph organs | ||
- Specialised blood vessels in the spleen | - Specialised blood vessels in the spleen | ||
+ Specialised site for lymphocyte extravasation | + Specialised site for lymphocyte extravasation | ||
|| [http://www.ncbi.nlm.nih.gov/books/NBK27125/figure/A1347 HEVs] [http://www.ncbi.nlm.nih.gov/books/NBK27125/figure/A1336 extravasation] | || [http://www.ncbi.nlm.nih.gov/books/NBK27125/figure/A1347 HEVs] [http://www.ncbi.nlm.nih.gov/books/NBK27125/figure/A1336 extravasation] | ||
Revision as of 10:57, 8 September 2016
Here are a few simple questions that relate to your lecture and Lymphatic Structure and Organs practical, this page is not a part of the lecture or practical class.
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