Tissue Fluid (AQA A-Level Biology): Flashcards
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Definition of tissue fluid
Definition of tissue fluid
Watery solution that surrounds and bathes all cells in the body
What are the main components found in tissue fluid?
What are the main components found in tissue fluid?
Glucose, amino acids, fatty acids, dissolved ions, oxygen
Process where hydrostatic pressure forces molecules out of blood
Process where hydrostatic pressure forces molecules out of blood
Ultrafiltration
Where is hydrostatic pressure highest in capillaries?
Where is hydrostatic pressure highest in capillaries?
Arterial end (where blood first arrives from heart)
What can pass through capillary walls during ultrafiltration?
What can pass through capillary walls during ultrafiltration?
Small molecules: water, glucose, amino acids, ions
What cannot pass through capillary walls?
What cannot pass through capillary walls?
Blood cells and large proteins
Two forces opposing fluid movement out of capillaries
Two forces opposing fluid movement out of capillaries
- Hydrostatic pressure of tissue fluid outside 2) Osmotic pressure from plasma proteins (lower water potential in blood)
Pressure inside capillaries at venous end vs tissue fluid
Pressure inside capillaries at venous end vs tissue fluid
Lower than tissue fluid pressure outside
System that collects excess tissue fluid
System that collects excess tissue fluid
Lymphatic system
Three mechanisms that move lymph toward the heart
Three mechanisms that move lymph toward the heart
Hydrostatic pressure, muscle contractions, one-way valves