Flashcards
Lecture 7
Flashcards do conjunto (18)
- 1What are some of the features that contribute to the efficiency of capillaries- Thin walls
- Large total cross sectional area
- Slow & smooth blood flow (easy exchange) - 2What type of junction is formed between the endothelial cells that form the outside of the capillaryTight junctions
- 3How is the flow of blood along the capillary blood influencedBy precapillary sphincters which can contract and relax to regulate the blood flow (involuntary process)
- 4What is a continuous capillaryThe most abundant form of capillary which has a continuous endothelial barrier which restricts the movement of molecules to an extent
- 5What is a fenestrated capillaryA capillary which has 'holes' along its length which allows for the movement of molecules - faster exchange and found in places such as the kidney
- 6What is an epithelial cellA type of cell that sits on tissue and faces open spaces forming barriers between different environments
- 7What is a sinusoidal capillaryA capillary that is very 'leaky', much wider lumen (3 to 4 RBC's), contain large openings which link on to specialised liver cells for the efficient exchange of nutrients from the blood.
- 8What way can lipid soluble molecules exit the capillaryDiffusion through the membrane
- 9What way can water soluble molecules exit the capillaryMovement through intercellular clefts and through fenestrations
- 10What way can large molecules exit the capillaryTransport via vesicles or caveolae (small indentations that allow for molecule exchange)
- 11What is the general purpose of the lymphatic systemPrevents fluid from gathering in tissue and causing swelling by removing the fluid that diffuses out of the blood. Also a key part of the immune system
- 12Functions of the lymphatic system- Drainage
- Surveying for foreign substances
- Absorbs fat from the intestines - 13What is the structure of the lymphatic system- Large dead ended capillaries
- Special groups of lymph called lacteals drain fat from the small intestine (gathers in a collecting vessel called the cisterna chyli) - 14What prevents the back flow of blood into the lymph systemValves at the point where the lymph redrains into the blood system
- 15Where does the thoracic duct meet with the vascular systemAt the left subclavian vein
- 16Where does the right lymphatic duct meet with the vascular systemAt the right subclavian vein
- 17What is the structure of the lymph nodeCage like mesh of immune cells
- 18What is the cisterna chyliA collecting vessel that connects on to the small intestine
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- HUBS192 FlashCards sobre Lecture 7, criado por Dom Hawkins em 20-07-2020.
- Criado por
- Dom Hawkins
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