18 Questions
What is the main characteristic of movement by diffusion?
It is a passive process
What factors affect diffusion across a cell membrane?
Concentration gradient, permeability of membrane, temperature, solubility in lipids, pressure and size of substances
What is the term specifically used to refer to the diffusion of water across a differentially or selectively permeable membrane?
Osmosis
What contributes to the solute potential of the cell in plants?
Vacuolar sap
What determines the net direction and rate of osmosis?
Both pressure gradient and concentration gradient
What happens when osmosis reaches equilibrium?
The two chambers will have nearly the same water potential
What is the primary mechanism of transportation of water and minerals in plants?
Vascular system
What direction does the transport of water and minerals occur in plants?
From roots to stems
What is the primary direction of transport of organic nutrients and minerals in plants?
Multidirectional
What is the primary limitation of diffusion in plants?
It is a slow process
What is the role of cytoplasmic streaming in plant transport?
Supplementing diffusion for shorter distances
What type of transport system is necessary for long distance transport of substances in plants?
Mass flow system
What is the significance of the vascular system in plant transport?
It facilitates long-distance transport of water and minerals
Why is diffusion insufficient for long distance transport of substances in plants?
Because it is a slow process
What is the term for the transport of substances over longer distances in plants?
Translocation
What is the purpose of special long distance transport systems in plants?
To move substances across long distances at a faster rate
What is the characteristic of mass flow system in plants?
It is the movement of substances in bulk from one point to another as a result of pressure differences
What is the primary function of long distance transport systems in plants?
To move substances across long distances at a faster rate
Understand the basics of cell transport, including diffusion and osmosis. Learn how these processes occur in cells and the factors that affect them.
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