Mass Transport In Animals Flashcards
What 2 factors mean diffusion of materials into an organism is too slow to meet demands
Small surface area to volume ratio
Increased activity of organism
What do mass flow systems need
A pump
4 common features of a transport system
Medium to carry materials
Form of mass transport
Closed system of tubes
Mechanism to move medium
What is equation with cardiac output
Cardiac output = stroke volume x heart rate
Volume of cylinder
Pi x r squared x length
What is correlation with risk factors and disease
When a change in one factor is reflected in a change in another factor
What is cause with risk factors and disease
When a change in one factor is responsible for the change in another factor
How does tissue fluid move out of capillary bed to bathe cells
High hydrostatic pressure nearer arteries
Move down gradient
High osmotic pressure out of capillaries due to proteins being left in blood
Hp>op
Net movement out of capillaries
How does water return to capillaries from tissue fluid
Lower gradient of hydrostatic pressure
High osmotic pressure out of capillaries
Op>hp
90% net movement of water by osmosis into capillaries
10% into lymphatic system to thoratic duct and into vena cava
Fluid in lymphatic system
Lymph
