Biology F211 Quiz

Cells, Exchange and Transport

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  • Created by: Hannah
  • Created on: 10-01-12 19:27
Explain why the walls of capillaries are composed of squamous epithelium cells
Squamous epithelial cells are thin, so there is a short diffusion pathway for oxygen and carbon dioxide
1 of 9
State how oxygen is exchanged between tissue fluid and cells
diffusion through the phospholipid bilayer
2 of 9
Explain why red blood cells are not found in tissue fluid, but white blood cells are.
Red blood cells can't pass through capillary walls, many white blood cells made in lymph nodes and enter blood via lymph
3 of 9
Explain why enlarging a photograph taken with a light microscope does not show more detail
Resolution is limited by the wavelength of light used in light microscopes
4 of 9
Explain why samples of biological material are stained before microscope work
To give contrast to material
5 of 9
State an adaptation of xylem vessels for transport of water
Lignin prevents inward collapse
6 of 9
Explain how roots absorb water from the soil
By osmosis, down a water potential gradient, from the soil water into root hair cells
7 of 9
What causes blood to have pressure?
The contraction of the left ventricle in the heart
8 of 9
Explain why meiosis is described as a reduction division
The number of chromosomes halves- diploid to haploid
9 of 9

Other cards in this set

Card 2

Front

State how oxygen is exchanged between tissue fluid and cells

Back

diffusion through the phospholipid bilayer

Card 3

Front

Explain why red blood cells are not found in tissue fluid, but white blood cells are.

Back

Preview of the front of card 3

Card 4

Front

Explain why enlarging a photograph taken with a light microscope does not show more detail

Back

Preview of the front of card 4

Card 5

Front

Explain why samples of biological material are stained before microscope work

Back

Preview of the front of card 5
View more cards

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Gracie

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This is very useful , thanks for a great quiz :P

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