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Why does water require channels to be transported across the membranes?
Wiki User
∙ 11y ago
Water doesn't require channels to be transported across membranes because water is small enough to slip past the membrane; however, some cells do have channels, called aquaporins, which greatly increase the rate that water passes through the membrane.
Wiki User
∙ 11y ago
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What are small channels that form across the plasma membranes of adjacent cells?
plasmodesmata
What is actively transported across plasma membranes?
name of the substance that is actively transported through the cell membrance of an animal cell
When Fatty acids are hydrolyzed they yield what?
transported across fat cell membranes by fatty acid binding proteins
How do ions get across the neuron membrane?
Ions can cross the neuron membrane through specific protein channels. These channels are selective, allowing only certain ions to pass through based on their size and charge. Additionally, ions can also be transported across the neuron membrane through active transport processes, which require energy in the form of ATP.
What two types of molecular movement across membranes require vesicles?
molecular have a parts/kinds there are vagaina and pennis
What are small channels that form across the plasma membranes of adjacent cells?
plasmodesmata
What is actively transported across plasma membranes?
name of the substance that is actively transported through the cell membrance of an animal cell
How plasma membrane diffuse across plasma membrane?
Ions can't diffuse across membranes, they must used channels to transport across
What is faciliated diffusion?
movement of specific molecules across cell membranes through protein channels
When Fatty acids are hydrolyzed they yield what?
transported across fat cell membranes by fatty acid binding proteins
What is facillitated diffusion?
Facilitated diffusion is, the movement of specific molecules across cell membranes through protein channels
How do charged particles such as Na and K move across membranes?
Through channels in the bilipid layer. The channels use ATP to pump molecules against the ion gradient.
How do ions get across the neuron membrane?
Ions can cross the neuron membrane through specific protein channels. These channels are selective, allowing only certain ions to pass through based on their size and charge. Additionally, ions can also be transported across the neuron membrane through active transport processes, which require energy in the form of ATP.
Definition of facilitated?
Facilitated diffusion (or facilitated transport) is a process of diffusion, a form of passive transport. Polar molecules and charged ions are dissolved in water but they can not diffuse freely across cell membranes due to the hydrophobic nature of the lipids that make up the lipid bilayers. Only small nonpolar molecules, such as oxygen can easily diffuse across the plasma membrane. All polar molecules should be transported across membranes by proteins that form transmembrane channels. These channels are gated so they can open and close, thus regulating the flow of ions or small polar molecules. Larger molecules are transported by transmembrane carrier proteins, such as permeases that change their conformation as the molecules are carried through, for example glucose or amino acids.
What two types of molecular movement across membranes require vesicles?
molecular have a parts/kinds there are vagaina and pennis
How does facilitated diffusion work?
It is a passive process utilizing a protein carrier or channel.
Which of the following processes cause substances to move across membranes and doesent require energy ATP?
diffusion or osmosis (diffusion of water)
