Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

marylou004

  • one year ago

Please am I correct? Water (H2O), carbon dioxide (CO2), and oxygen (O2) are all quite small molecules, yet they move across cell membranes differently. Both CO2 and O2 passively diffuse across the cell membrane directly while H2O moves across the cell membrane by facilitated diffusion. What can be concluded about these three molecules based on the way they react to the cell membrane? The amount of H2O the cell allows to cross the membrane must be more carefully controlled than the amounts of CO2 or O2. The concentration of H2O is higher outside the cell and the concentrations of CO2 and O2 are higher inside the cell. The H2O molecules are repelled by the lipid tails of the phospholipids, but the CO2 and O2 molecules are not. The H2O molecules are too large to pass between the phospholipids while the molecules of CO2 and O2 are not.

  • This Question is Closed
  1. marylou004
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Sorry thought I posted this but is the 3rd answer correct?

  2. nincompoop
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    well you have to know what the membrane is made up of.

  3. nincompoop
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    your clue is: phospholipid

  4. marylou004
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Thanks

  5. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Ask a Question
Find more explanations on OpenStudy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.