Which 'study break' activity do you find most distracting?
Talking / texting
Playing video games
Listening to music
Watching TV
Browsing the web
If you would like to vote in this poll, please login or register

New Topic  
Posts: 24690
Credits: 1421
4 years ago
Explain the differences between uniporters, symporters, and antiporters.
Read 5419 times
2 Replies
Sunshine ☀ ☼
4 years ago
Because the hydrophobic interior of the lipid bilayer cell membrane is such a substantial barrier, diffusion is not possible for polar molecules and they must be transferred in (or out) of the cell using transport proteins (diffusion is not possible). Each transport protein is specialized for a certain molecule.

A gradient of any solute (Na+ for instance) across a membrane can be used to fuel the active transport of a second solute. The downhill movement of the first solute down its gradient provides the energy to drive the uphill transport of the second solute. The proteins that do this are called coupled transporters: if the transporter moves both solutes in the same direction across the membrane it is called a symport, if it moves them in opposite directions it is called an antiport. A transporter that moves only one type of solute (not coupled transport) is a uniport.

Uniports, symports, and antiports are used for passive and active transport.
4 years ago
Your answers should highlight differences in transport direction and energy input.
✓ Don't be mean, we need followers on Twitter too! Slight Smile
New Topic      
Similar Topics that might Interest You...
Cell Biology   4 years ago   colleen   sci_expert   1 Reply   960 Views
Cell Biology   4 years ago   colleen   chemb   1 Reply   3134 Views
Anatomy and Physiology   2 years ago   bgoodrich   bio_man   3 Replies   678 Views
Business   2 years ago   S_leve3   3 Replies   878 Views
This topic is currently locked from adding new posts. Only administrators and moderators can reply. If you'd like to contribute to this topic, start a new thread and make reference to this one. Otherwise, contact a moderator for more options.


Post homework questions online and get free homework help from tutors.
Learn More
Improve Grades
Help Others
Save Time
Accessible 24/7
There are currently 562 guests browsing and 41 members online. So far today, 907 students have registered.
Related Images