Topic 1 - Cell Biology Flashcards
1
Q
Explain active transport
A
It is used when we want substances to go against the concentration gradient. Energy from respiration is required to make this happen
2
Q
Explain the adaptations of villi and alveoli.
A
Villi - big surface area, good blood supply
Alveoli - big surface area, moist lining, thin walls, good blood supply
3
Q
What is the formula for magnification
A
Magnification = Image size/ Actual size
4
Q
What is the difference between a light and electron microscope
A
Light uses light + lenses to form an image.
Electron microscopes use electrons meaning they have a higher resolution
