Cell Transport Mechanisms: Channel Proteins

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What is the primary function of channel proteins in the cell membrane?

To regulate hydrostatic pressure in the cell

To shuttle molecules individually across the membrane

To change shape and bind to specific molecules

To create a direct pathway for specific molecules to pass through (correct)

What is the characteristic of transport through channel proteins?

It is non-selective and involves diffusion

It is slow and involves binding to molecules

It is fast and involves a direct pathway (correct)

It is selective and involves shape changes

What is the mechanism of transport of carrier proteins?

Creating a direct pathway for molecules to pass through

Facilitating fluid distribution across the membrane

Binding to specific molecules and changing shape (correct)

Regulating osmotic pressure in the cell

What is the characteristic of carrier proteins during transport?

They change shape during the transport process Signup and view all the answers

Which type of transport protein is highly selective and often specific to certain molecules?

Both channel and carrier proteins Signup and view all the answers

What is the difference between channel proteins and carrier proteins in terms of transport speed?

Channel proteins are faster, while carrier proteins are slower Signup and view all the answers

What is the process by which solutes move from an area of low concentration to an area of high concentration, requiring energy and ATP?

Active transport Signup and view all the answers

What is the term that describes the balance of water movement between the inside and outside of a cell, resulting in no net movement of water?

Isotonic Signup and view all the answers

What is the term that describes the number of particles in a solution, with higher osmolarity indicating a more 'crowded' solution?

Osmolarity Signup and view all the answers

What type of transport involves the movement of molecules from an area of high concentration to an area of low concentration, without the use of energy?

Passive transport Signup and view all the answers

What is the term that describes the movement of water into or out of a cell, resulting in changes in cell shape and size?

Osmosis Signup and view all the answers

What is the name of the pump that uses active transport to move sodium and potassium ions across the cell membrane?

Sodium-potassium pump Signup and view all the answers

What is the primary function of facilitated diffusion in biological systems?

To aid the movement of molecules across the cell membrane that are unable to freely cross the phospholipid bilayer Signup and view all the answers

What is the term for the continual exchange of water and solutes among body fluid compartments through processes such as filtration, reabsorption, diffusion, and osmosis?

Fluid distribution Signup and view all the answers

What is the approximate percentage of total body water in a 70kg adult male?

60% Signup and view all the answers

What is the term for the movement of molecules from an area of higher concentration to an area of lower concentration without the use of energy?

Diffusion Signup and view all the answers

What is the term for the movement of water molecules from an area of higher concentration to an area of lower concentration through a selectively permeable membrane?

Osmosis Signup and view all the answers

What is the term for the movement of molecules across the cell membrane that requires the use of energy?

Active transport Signup and view all the answers

Cell Transport Mechanisms: Channel Proteins

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