Tissue Fluid and Lymph Vessels

Beschreibung

A level Biology (3.1.2 Transport in Animals) Karteikarten am Tissue Fluid and Lymph Vessels, erstellt von Yinka F am 01/02/2018.
Yinka F
Karteikarten von Yinka F, aktualisiert more than 1 year ago
Yinka F
Erstellt von Yinka F vor fast 7 Jahre
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Zusammenfassung der Ressource

Frage Antworten
What is tissue fluid? Tissue fluid is the fluid surrounding cells in tissue. It is made from oxygen, water and nutrients
Outline the process of pressure filtrationq 1. At the arteriole end, the hydrostatic pressure inside capillaries is greater than that in the tissue fluid - this forces fluid out of capillaries, forming tissue fluid 2. As fluid leaves, the hydrostatic pressure reduces in capillaries; it is lower at the venous end 3. As water leaves capillaries, the water potential decreases 4. Plasma proteins in capillaries generate oncotic pressure; at the venous end there is lower water potential and high oncotic pressure 5. As water potential in capillaries is lower than in the tissue fluid, some water re-enters the capillaries from the tissue fluid at the venous end
TRUE OR FALSE Pressure is highest at the end of the capillary bed FALSE Pressure is highest at the START of a capillary bed nearest the arteriole
What is the high pressure at the start of the capillary bed caused by? The high pressure is caused by the left ventricle contracting and sending blood out of the heart at high pressure
TRUE OR FALSE: Not all of the tissue fluid re-enters at the venous end TRUE Some excess tissue fluid is left over
What is the lymphatic system? A drainage system made up of lymph vessels
What happens to the extra fluid that does not re-enter at the venous end of the capillary bed? Excess tissue fluid passes into lymph vessels and are eventually returned to the blood through the lymphatic system
Excess tissue fluid passes into lymph vessels. Once inside, what is the tissue fluid called? Lymph
Complete the sentence: _________ in the vessels stop the lymph going ______________. VALVES in the vessels stop the lymph going BACKWARDS.
Where in the body is excess tissue returned to the blood? Lymph gradually moves towards the main lymph vessels in the thorax. Here, it is returned to the blood near the heart
Where are red blood cells found? Blood
Red blood cells are NOT found in tissue fluid or lymph. Why? Red blood cells are too big to get through capillary walls
Where are white blood cells found? Blood Tissue fluid (very few) Lymph
There are very few white blood cells tissue fluid. Why? Most white blood cells are in the lymphatic system. They only enter tissue fluid if there is an infection
Where are platelets found? Blood
In what circumstances are platelets found in tissue fluid? Platelets are only in tissue fluid if the capillaries are damaged
Where are proteins found? Blood Tissue fluid (very few) Lymph (only antibodies)
Why are there only very few proteins in tissue fluid/lymph? Most plasma proteins are too big to get through capillary walls
Where is water found? Blood Tissue fluid Lymph
TRUE OR FALSE: Tissue fluid and lymph have a lower water potential than blood FALSE Tissue fluid and lymph have a HIGHER water potential than blood
Where are dissolved solutes found? Blood Tissue fluid Lymph (Solutes, e.g. salt, can move freely between the three)
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