Selective Permeability of Cell Membrane
13 Questions
1 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which type of substances can enter the cell membrane without the need for protein helpers?

  • Polar, hydrophilic molecules
  • Nonpolar, hydrophobic molecules (correct)
  • Glucose
  • Ions
  • What is the main factor that affects the rate of diffusion in passive transport processes?

  • Availability of carrier proteins
  • Steepness of the concentration gradient (correct)
  • Presence of aquaporins
  • Opening of gated channels
  • In the context of active transport, what is the role of ATP?

  • To open aquaporins
  • To provide energy for pumping molecules against their concentration gradient (correct)
  • To facilitate diffusion of ions
  • To maintain turgor pressure in cells
  • Which process involves the cell membrane engulfing particles or fluids from the external environment?

    <p>Endocytosis</p> Signup and view all the answers

    What is the color indicator used in the Dialysis Bag with Starch and Iodine Lab Demo?

    <p>Iodine</p> Signup and view all the answers

    How do aquaporins facilitate the movement of water across the cell membrane?

    <p>By forming channel proteins for water transport</p> Signup and view all the answers

    What happens to animal cells in a hypertonic solution?

    <p>Cells shrink (crenation)</p> Signup and view all the answers

    What type of substances typically require protein helpers to cross the cell membrane?

    <p>Polar, hydrophilic molecules</p> Signup and view all the answers

    What is the purpose of the Sodium/Potassium Pump in cells?

    <p>For proper functioning of neurons</p> Signup and view all the answers

    What is affected by whether gated channels are open or closed in facilitated diffusion?

    <p>Rate of diffusion</p> Signup and view all the answers

    What type of molecules make up the tails of the phospholipid bilayer?

    <p>Hydrophobic</p> Signup and view all the answers

    What role do aquaporins play in facilitating the movement of water through the cell membrane?

    <p>Form channel proteins for water transport</p> Signup and view all the answers

    What is the effect of hypotonic solution on plant cells?

    <p>Turgor pressure increases</p> Signup and view all the answers

    More Like This

    Cell Membrane Quiz
    40 questions

    Cell Membrane Quiz

    BreathtakingStatueOfLiberty avatar
    BreathtakingStatueOfLiberty
    Use Quizgecko on...
    Browser
    Browser