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The diffusion of K out of the cell makes the inside of the cell less positive or more negative and acts to restore the original resting membrane potential This process is called?
Wiki User
∙ 15y ago
repolarization
Wiki User
∙ 15y ago
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How does endocytosis work?
In endocytosis, molecules or other particles that are too large to enter a cell by diffusion, facilitated diffusion, or active transport are conveyed within a vesicle formed from a section of the cell membrane. This process uses cellular energy.
Examples of facilitated diffusion?
This is an example of active transport. This type of diffusion utilizes ATP whereas Passive diffusion don't. There are special pores or transporter proteins in the cell wall of any microbial cell, which allows diffusion of a molecule across it with the consumption of ATP. Example Sodium Potassium Pump, which allows transport of Na and K across the cell membrane. Here, Sodium is flushed out of the cell and K is taken in via the membrane transporter protein with the consumption of ATP. New Answer. Facilitated Diffusion is a form of passive transport as opposed to active transport. It allows the passage of substances to cross membranes with the assistance of transporter proteins. Some substances such as glucose, sodium and chloride ions cannot pass through the lipid bi-layer of cell membranes. by using ion channel proteins and carrier proteins which are embedded in the cell membrane these type of substances can be transported. The ion channel proteins allow specific ions to pass though a protein channel. They are regulated by the cell and are either open or shut so controlling the passage of the substance into the cell. Carrier proteins bind specific molecules, change shape and then deposit it across the membrane. Once completed they return to their original position.
What is the movement of molecules from areas of higher concentration to lower concentration until equilibrium is met?
The movement of particles from an area of high concentration through a semi-permeable membrane to an area of low concentraton is the process of diffusion. I'm sorry but I do not think that answer is good enough. It is a form of diffusion, where only small particles, small enough to pass through the membrane can get through. When I was in school the statement above was the definition of osmosis, the whole point being it was diffusion through a semi-permeable membrane, selecting for only small enough particles. It seems some time between 1992 and 2003 the definition was changed to the movement of water, and not particles and now in 2010 the definition is the movement of solvents. I would like to know how and why the definition osmosis was changed, why and what is the justification? I would also like to know why the original meaning of osmosis, which made perfect sense, has been changed to "it's the definition of diffusion and not osmosis any more", when in fact it isn't a clear enough word to describe the process? Surely the new definition of osmosis is also diffusion?
Do negative feedback mechanisms decrease or end the original stimulus?
tough question. negative feedback system is a dynamic system, therefore always in change. so it can end the stimulus if needed, but usually decreases the stimulus to maintain balance. Balance is the key word in the negative feedback system
Is carrier proteins passive transport or active transport?
Carrier proteins can use active or passive transport depending on what type of carrier protein it is (meaning what the protein transports). The form of passive transport that they use is facilitated diffusion. An example of active transport is the Sodium Potassium pump. Active transport requires ATP. Facilitated diffusion is used to transport polar molecules and ions that cannot directly cross the cell membrane. Facilitated diffusion doesn't require energy.
The sudden reversal of electrical charge across the neuron membrane is called?
Action potential is a short-lasting event in which the electrical membrane potential of a cell rapidly rises and falls, following a consistent trajectory. Action potentials occur in several types of animal cells, which include neurons, muscle cells, and endocrine cells, as well as in some plant cells. In neurons, they play a central role in cell-to-cell communication.
What is the negative of negative integer?
The negative of a negative is always the original number.
What happens to electrons in the thylakoid membrane?
they return to their original energy levels.
How does endocytosis work?
In endocytosis, molecules or other particles that are too large to enter a cell by diffusion, facilitated diffusion, or active transport are conveyed within a vesicle formed from a section of the cell membrane. This process uses cellular energy.
What do you do when you are adding a negative and a negative?
You minus it off the original negative number, so if it was -5 plus -2 it equals -7
How can works capacitors?
When connected to a d.c. supply, electrons are transferred from one plate and deposited on the opposite plate. This creates a potential difference across the two plates. This action continues until the capacitor's potential difference is equal (but opposite) to the potential difference of the d.c. source. If the source is then removed, the electrons cannot return to the original plate, other than through the dielectric, so the capacitor will hold that potential difference. By definition, the charge 'stored' on the capacitor is the amount of negative charge on the negative plate (not the sum of the charges on the two plates). Leakage current through the dielectric gradually reduces the potential difference across the plates.
What occurs when positively charged ions such as potassium leave the cell causing the positive charge to lower?
When positively charged ions like potassium leave the cell, the positive charge within the cell decreases. This process is known as hyperpolarization. It makes the inside of the cell more negative and can lead to changes in membrane potential and the initiation of other electrical signals in the cell.
How will the distance an object moves be related to it original potential energy?
If it is moved upward, it's potential energy will increase. If it is moved lower, then it's potential energy will decrease.
Examples of facilitated diffusion?
This is an example of active transport. This type of diffusion utilizes ATP whereas Passive diffusion don't. There are special pores or transporter proteins in the cell wall of any microbial cell, which allows diffusion of a molecule across it with the consumption of ATP. Example Sodium Potassium Pump, which allows transport of Na and K across the cell membrane. Here, Sodium is flushed out of the cell and K is taken in via the membrane transporter protein with the consumption of ATP. New Answer. Facilitated Diffusion is a form of passive transport as opposed to active transport. It allows the passage of substances to cross membranes with the assistance of transporter proteins. Some substances such as glucose, sodium and chloride ions cannot pass through the lipid bi-layer of cell membranes. by using ion channel proteins and carrier proteins which are embedded in the cell membrane these type of substances can be transported. The ion channel proteins allow specific ions to pass though a protein channel. They are regulated by the cell and are either open or shut so controlling the passage of the substance into the cell. Carrier proteins bind specific molecules, change shape and then deposit it across the membrane. Once completed they return to their original position.
Why is the quotient of two negative numbers positive?
A negative number is an opposite or reversal of a positive number. For example, if a million dollars is a lot of money to have, then it is also true that a million dollars is a lot of money to owe. If you reverse something twice, you return to the original state. So a negative times a negative (or a negative divided by a negative) is a positive. The opposite of the opposite is the original.
What occurs As a result of a negative feedback mechanism?
In a negative feedback system the response of the effector reverses the original stimuli.
What potential energy does a squashed ball have?
When a ball is squashed, it gains potential energy due to the compression of its material. This potential energy is stored in the form of elastic potential energy, as the ball has the potential to return to its original shape when released.
