Transport and Membrane Flashcards Preview

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Flashcards in Transport and Membrane Deck (10):
1

Give examples for a simple diffusion

O2, CO2, lipid based molecules such as steroids

2

Give examples for facilitated diffusion (DE: erleichterte Diffusion) using channel proteins (DE: Kanalprotein)

Na+, Ca++

3

Give examples for diffusion using carrier proteins (DE: Carrier-Protein)

larger molecules like glucose and amino acids

4

Give examples for bulk transport (endocytosis/ exocytosis)

hormones, white blood cells engulfing microorganism

5

What does kiloPascal (kPa) stand for?

water potential

6

What does 0 kPa mean?

  • 0 kPa: is the highest water potential (pure water)
  • kPa: the more the negative the more particles are in water

7

When does an animal cell burst?

An animal cell bursts when it is put into a solution with high water potential because water molecules will diffuse (DE: diffundieren) into the cell.

8

What happens when a plant cell is put into water with high water potential?

The cell membrane pushed against the call wall and the cell becomes turgid.

9

When does an animal cell shrink?

When an animal cell is put into a solution with very negative water potential it shrinks. Water molecules diffuse from the cell into the solution.

10

What happens if a plant cell is put into a solution with negative water potential?

The plant cell membrane pulls away from the cell wall as water diffuses from the cell into the solution. The plant cell is plasmolysed (DE: Plasmolyse).