Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards
share
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Gaseous exchange 11

QuestionAnswer
Respiratory media Source of oxygen
Respiratory media for aquatic organisms Water
Respiratory media for terrestrial organisms Air
Main source of oxygen on earth is Atmospheric air
Oxygen percentage in Water Is 5%
Oxygen percentage in atmospheric air is 21%
Why it is difficult for aquatic organisms to obtain oxygen? Due to greater density of water and lesser concentration of oxygen
Why respiration gradient is essential in respiration? The change in partial pressure from the alveoli (high concentration) to the capillaries (low concentration) drives the oxygen into the tissue and the carbon dioxide into the blood (high concentration) from the tissues (low concentration), which is then re
Pressure difference derives oxygen into blood how? the change in partial pressure from the alveoli to the capillaries drives the oxygen into the tissues and the carbon dioxide into the blood from the tissues. The blood is then transported to the lungs where differences in pressure in the alveoli result in
Diffusion gradient is essential for Gaeseous exchange to takes place because it allows diffusion across capillaries and alveoli Importance of diffusion gradient
What is impervious layer? The layer not allowing fluid to pass through
Metabolic pathway that occur only in day time and in chlorophyll containing cells? Photosynthesis
Metabolic pathway that occur in day and night in all cells of plants for obtaining energy Is ? Respiration
in aquatic unicellular organisms gaseous exchange takes place by Diffusion across moist cell membrane
Means of gaseous exchange in lower plants in water is ____ Wet body surface
Why some organisms take in oxygen through their body surface ? Because their surface area is greater than volume
How is the surface area to volume ratio maximized in the lungs? The millions of tiny alveoli in the human lungs are a very effective adaptation which provides a huge surface area for gaseous exchange into and out of the blood.
Why diffusion of gases through body surface in higher plants is prevented ? Due to development of cuticle a waxy covering
Leaves exchange gases through___ Stomata (on the epidermis)
Bean shaped modified epidermal cells which form stomata are called ? Guard cells
Localized regions of Lossely arranged cork cells in stems with intracellular air spaces are called lenticels
in roots gaseous exchange takes place through ____ Epidermal cells and root hairs
Which system is absent in plants Respiratory system
How diffusion allows all the cells of plant take in and gives out gases? Due to presence of air spaces between cells
Created by: Aafia