The Basic Units of Life (Grade 10 NSC Matric Life Sciences): Flashcards
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Who developed cell theory and when?
Who developed cell theory and when?
Schleiden and Schwann in 1839
What are cells in relation to life?
What are cells in relation to life?
Basic building blocks of life
Main component of plant cell walls
Main component of plant cell walls
Cellulose fibres
Is the cell wall permeable to water?
Is the cell wall permeable to water?
Yes, completely permeable
Who proposed the fluid mosaic model?
Who proposed the fluid mosaic model?
Singer and Nicolson in 1972
Phospholipid heads are...
Phospholipid heads are...
Hydrophilic (water-loving)
Define diffusion
Define diffusion
Movement from high to low concentration, passive
Define osmosis
Define osmosis
Water movement from high to low water potential
Effect of hypertonic solution on cells
Effect of hypertonic solution on cells
Water leaves cell, causing it to shrink
Does active transport require energy?
Does active transport require energy?
Yes, requires ATP