Exam 2 - Circulation and Gas Exchange Flashcards
1
Q
How are pressure and volume related for a fixed volume of liquid?
A
- pressure depends on the volume of the space the liquid occupies
- inversely proportional
2
Q
How does fluid flow?
A
from high pressure to low pressure
3
Q
What are the characteristics of diffusion?
A
- gas and liquid molecules are in constant random motion
- molecules move down the concentration gradient
- once the molecules are evenly distributed there is no longer a gradient
4
Q
What are the characteristics of diffusion?
A
- passive, with no additional energy needed
- important in CO2/O2 gas exchange
5
Q
What is osmosis?
A
diffusion of free water across a selectively permeable membrane
6
Q
What is blood movement through the heat and blood vessels dependent on?
A
differences in blood pressure
