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Cell Transport and Osmosis

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Questions and Answers

What is the main characteristic of movement by diffusion?

It is dependent on a 'living system'

It is a passive process (correct)

It is a fast process

It only occurs in animals

What factors affect diffusion across a cell membrane?

Only concentration gradient and permeability of membrane

Concentration gradient, permeability of membrane, temperature, solubility in lipids, pressure and size of substances (correct)

Temperature, solubility in water, and size of substances

Only temperature and solubility in water

What is the term specifically used to refer to the diffusion of water across a differentially or selectively permeable membrane?

Passive transport

Active transport

Diffusion

Osmosis (correct)

What contributes to the solute potential of the cell in plants?

Vacuolar sap Signup and view all the answers

What determines the net direction and rate of osmosis?

Both pressure gradient and concentration gradient Signup and view all the answers

What happens when osmosis reaches equilibrium?

The two chambers will have nearly the same water potential Signup and view all the answers

What is the primary mechanism of transportation of water and minerals in plants?

Vascular system Signup and view all the answers

What direction does the transport of water and minerals occur in plants?

From roots to stems Signup and view all the answers

What is the primary direction of transport of organic nutrients and minerals in plants?

Multidirectional Signup and view all the answers

What is the primary limitation of diffusion in plants?

It is a slow process Signup and view all the answers

What is the role of cytoplasmic streaming in plant transport?

Supplementing diffusion for shorter distances Signup and view all the answers

What type of transport system is necessary for long distance transport of substances in plants?

Mass flow system Signup and view all the answers

What is the significance of the vascular system in plant transport?

It facilitates long-distance transport of water and minerals Signup and view all the answers

Why is diffusion insufficient for long distance transport of substances in plants?

Because it is a slow process Signup and view all the answers

What is the term for the transport of substances over longer distances in plants?

Translocation Signup and view all the answers

What is the purpose of special long distance transport systems in plants?

To move substances across long distances at a faster rate Signup and view all the answers

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 Signup and view all the answers

What is the primary function of long distance transport systems in plants?