Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
13 Cards in this Set
- Front
- Back
|
Precentages of Gases in the Air
|
Oxygen -21%
Nitrogen -79% CO2 -.03% |
|
|
What is respiration?
|
the exchange of O2 and CO2 between the cell and the environment.
|
|
|
Partial Pressures
|
The Partial Pressure gradient moves gases. Moves from high to low. PO2 in lung=~105, tissues=~40. O2 moves from lungs to tissues.
|
|
|
Factors that influence how much gas enters a liquid...
|
1)nature of the gas - solubility
2)temo - more gas stays in cooler liquid 3)nature -solid/liquid/gas 4)pressure 5)solutes - solutes push gas out of liquid 6)resp. pigments |
|
|
What is 'bends'?
|
when scuba diving and come up to fast the pressure changes too fast and nitrogen bubbles out of your blood.
|
|
|
Which is a better respiratory medium..air or liquid?
|
AIR -- diffusion is 10,000 times faster and less energy is required to move air. more oxygen per liter of air
|
|
|
What could cause a fish die-off?
|
If the water temp increased then the oxygen would diffuse out and the fish would not have enough oxygen to survive.
|
|
|
What is the problem with a spherical organism?
|
sphere has less SA for diffusion. has to be the size of a pin-head b/c a larger radius requires a larger PO2
|
|
|
Diffusion
|
Diffusion is proportional to distance squared
|
|
|
How do we get oxygen from outside of body to inside and obtain enough O2?
|
circ. system, lungs/gills, and a tracheal system, resp. pigments, large organism must be flat
|
|
|
why is respiration so important?
|
We need O2 to get rid of CO2 so we can make ATP
|
|
|
CO2
|
major byproduct of Krebs cycle
|
|
|
O2 and respiration
|
O2 is the final electron acceptor in the electron tansport chain
|
