W6 - DIFFUSION AND OSMOSIS

0.0(0)
studied byStudied by 0 people
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
Card Sorting

1/7

encourage image

There's no tags or description

Looks like no tags are added yet.

Study Analytics
Name
Mastery
Learn
Test
Matching
Spaced

No study sessions yet.

8 Terms

1
New cards

passive transport

  • no energy

    • simple diffusion

    • facilitated diffusion

    • osmosis

  • water and solutes cross based on concentration on either side of the membrane (concentration gradient

2
New cards

simple diffusion

  • lipid soluble

  • solute move down concentration gradient

  • high → low

  • speed influenced by size of solutes and gradient

    • larger difference between high and low gradient = solutes more quickly

    • larger solutes = slow pass through plasma membrane

<ul><li><p>lipid soluble</p></li><li><p>solute move down concentration gradient</p></li><li><p>high <span>→ low</span></p></li><li><p><span>speed influenced by size of solutes and gradient</span></p><ul><li><p>larger difference between high and low gradient = solutes more quickly</p></li><li><p>larger solutes = slow pass through plasma membrane</p></li></ul></li></ul><p></p>
3
New cards

facilitated diffusion

  • channel- and carrier- mediated

  • water-soluable

  • solutes are “helped” across the membrane

  • solutes move down concentration gradient

  • Na+ = water soluble and can’t come into contact w/ hydrophobic core

  • glucose binds to carrier protein (conformational change) = allows glucose to be released on other side

<ul><li><p>channel- and carrier- mediated </p></li><li><p>water-soluable</p></li><li><p>solutes are “helped” across the membrane</p></li><li><p>solutes move down concentration gradient</p></li><li><p>Na+ = water soluble and can’t come into contact w/ hydrophobic core</p></li><li><p>glucose binds to carrier protein (conformational change) = allows glucose to be released on other side</p></li></ul><p></p>
4
New cards

osmosis

  • passage of water across plasma membrane

    • moves through small gaps and aquaporin

  • helps balance concentration of penetrating and non-penetrating solutes

  • water touching core = disruptions to PM

  • PM = fluid mosaic model = movement creates gaps between phospholipid tails, allowing water to slip through

    • tails slight move apart

  • penetrating = can cross plasma membrane

  • non-penetrating = cannot cross plasma membrane

<ul><li><p>passage of water across plasma membrane</p><ul><li><p>moves through small gaps and aquaporin</p></li></ul></li><li><p>helps balance concentration of penetrating and non-penetrating solutes</p></li><li><p>water touching core = disruptions to PM</p></li><li><p>PM = fluid mosaic model = movement creates gaps between phospholipid tails, allowing water to slip through</p><ul><li><p>tails slight move apart</p></li></ul></li><li><p>penetrating = can cross plasma membrane</p></li><li><p>non-penetrating = cannot cross plasma membrane</p></li></ul><p></p>
5
New cards

tonicity

  • the ability of a solution to change shape or tone of a cell

    • water moves across PM due to “non-penetrating” solutes

<ul><li><p>the ability of a solution to change shape or tone of a cell</p><ul><li><p>water moves across PM due to “non-penetrating” solutes</p></li></ul></li></ul><p></p>
6
New cards

isotonic

  • solution on the outside of the cell is isotonic in respect to the inside of the cell

  • same concentration inside and out

  • no net movement of water - amount moving in = amount moving out

7
New cards

hypertonic

  • solution is hypertonic on the outside compared to the inside of the cell.

  • high concentration on outside of cell

  • high concentration = solutes can’t cross (non-penetrating(

  • water drawn out to try dilute outside concentration

  • cell shrinks, changing shape of cell

8
New cards

hypotonic

  • solution is hypotonic on the outside compared to the inside

  • low concentration on outside of cell

  • water pushed inside cell to balance out concentration

  • push PM = sell swells = too much water = burst