3.1.2 Animal transport – Tissue Fluid and Lymph Flashcards
(13 cards)
List the four main components of blood.
Plasma, red blood cells, white blood cells, platelets.
What is the function of tissue fluid?
It surrounds the cells and tissues allowing exchange of useful and waste products.
What is hydrostatic pressure?
The pressure that a fluid exerts on the sides of a vessel.
What is oncotic pressure?
The pressure created by the osmotic effects of the solutes.
How does hydrostatic pressure affect the blood at the arterial end of a capillary?
The high hydrostatic pressure causes the small molecules (water with dissolved substances) to be squeezed through the blood capillary.
Name two components of the blood that do not move out of the blood and into the tissue fluid at the arterial end.
Cells (red and white) and plasma proteins.
How does oncotic pressure affect the blood at the arterial end of a capillary?
Due to the lower water potential in the capillary the oncotic pressure causes some of the water to move back into the capillary.
What is the name of the fluid that has been removed from the capillary?
Tissue fluid
What does tissue fluid contain?
Water, ions, glucose, amino acids, oxygen, carbon dioxide, urea.
How does oncotic pressure affect the blood at the venous end of a capillary?
The very low water potential in the capillary at the venous end causes water from tissue fluid to move back into the capillary.
How does hydrostatic pressure affect the blood at the venous end of a capillary?
The low hydrostatic pressure in the capillary at the venous end causes very little water to move out of the capillary.
What does lymph contain?
It is the same as tissue fluid except it contains more lipids and more lymphocytes.
Where is lymph found?
Lymphatic system/lymphatic vessels
