Biology: Tissue Fluid

Question 1

What is tissue fluid formed by?

Answer 1

blood plasma carrying dissolved substances leaked from the capillaries

Question 2

What does tissue fluid do?

Answer 2

-surrounds cells in tissue -provides oxygen and nutrients

Question 3

How does tissue fluid move?

Answer 3

-mass flow -movement of fluids down pressure gradient -net outflow of plasma from arterial
-caused by high blood pressure/high hydrostatic pressure

Question 4

Where does excess tissue drain to?

Answer 4

vessels of lymphatic system

Question 5

What is lymph?

Answer 5

colourless/pale/yellow fluid containing lipids

Question 6

Outline the movement of lymph

Answer 6

passes through lymphatic system, drains into blood via vena cave

Question 7

What main component is found within lymph, why is this important?

Answer 7

-lymphocytes -type of white blood cell which helps filter foreign material

Question 8

Outline process by which tissue fluid is formed

Answer 8

-arterioles, high hydrostatic pressure than fluid, high hydrostatic pressure than osmotic
-differences forces fluid with small molecules out of blood through pores in capillary
-RBCs, platelets and plasma proteins too large
-diffusion, facilitated and active transport occur between cells and tissue fluid, less in fluid
-reduces hydrostatic pressure, blood pressure at venous lower
-water leaves, plasma proteins lower water potential
-water potential lower than tissue fluid, osmotic pressure higher than hydrostatic
-water moves by osmosis into capillaries
-excess tissue fluid not reabsorbed is introduced to lymphatic system