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Does the number of anions and cations need to be equal in a cell?
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The potential difference across the cell membrane is due to the separation of?
Cations and anions, yes. I had the same question on my Biology exam.
Depolarization would occur.....a-sodium cations leave the cell b-potassium cations leave the cell c--chloride anions enter the cell d-calcium cations enter the cell?
In a polarized cell membrane there are an excess of sodium cations outside the cell and a relative abundance of potassium cations inside the cell. When a cell depolarizes, sodium ions rush into the cell causing the interior surface of the cell membrane to become slightly more positive, i.e. depolarized. When this happens it triggers potassium channels to open allowing potassium ions to flow out repolarizing the cell. While not completely correct, the best answer of your choices here would be b - potassium cations leave the cell.
How does chemiosmosis bring anions into the plant cell?
Chemiosmosis does not physically bring in these materials. This ATP can be used to power pumps used to bring cations and anions in through active diffusion and is also used for the calvin cycle which creates glucose.
The membrane potential of a cell favors?
movement of cations into the cell
Why is cell membrane impermeable to organic anions?
The cell membrane is impermeable to most ions. An ion channel is needed for cations and anions to cross the membrane, thus they can't freely pass the plasma membrane. Axons of neurons lack specific permeability for anions - which might explain why your asking this question and why you think cells lack anionic permeability (which they don't). Ion channels in the axon have pores with high concentrations of negatively charged amino acids on the cellular and extracellular sides of the channel. This causes a repulsion of anion's while attracting cations, however being simple diffusion it's important not to suggest that the cations are being sucked out like a vacuum, the concentration gradient plays a predominant when dictating which ions and how fast they will be diffusion into our out of the cell.
The potential difference across the cell membrane is due to the separation of?
Cations and anions, yes. I had the same question on my Biology exam.
What is the function of a salt-bridge in an electrochemical cell?
The salt bridge allows cations to move in the galvanic cell. Electrons move from the anode to the cathode, leaving cations behind. The salt bridge allows for a balance of cations and anions to occur to continue the flow of electrons.
Depolarization would occur.....a-sodium cations leave the cell b-potassium cations leave the cell c--chloride anions enter the cell d-calcium cations enter the cell?
In a polarized cell membrane there are an excess of sodium cations outside the cell and a relative abundance of potassium cations inside the cell. When a cell depolarizes, sodium ions rush into the cell causing the interior surface of the cell membrane to become slightly more positive, i.e. depolarized. When this happens it triggers potassium channels to open allowing potassium ions to flow out repolarizing the cell. While not completely correct, the best answer of your choices here would be b - potassium cations leave the cell.
Describe basic operation of a batteries?
battery is a device that converts chemical energy directly to electrical energy. It consists of a number of voltaic cells. Each voltaic cell consists of two half cells connected in series by a conductive electrolyte containing anions and cations. One half-cell includes electrolyte and the electrode to which anions (negatively charged ions) migrate, i.e., the anode or negative electrode. The other half-cell includes electrolyte and the electrode to which cations (positively charged ions) migrate, i.e., the cathode or positive electrode. In the redox reaction that powers the battery, cations are reduced (electrons are added) at the cathode, while anions are oxidized (electrons are removed) at the anode. The electrodes do not touch each other but are electrically connected by the electrolyte
How does chemiosmosis bring anions into the plant cell?
Chemiosmosis does not physically bring in these materials. This ATP can be used to power pumps used to bring cations and anions in through active diffusion and is also used for the calvin cycle which creates glucose.
The membrane potential of a cell favors?
movement of cations into the cell
Why is cell membrane impermeable to organic anions?
The cell membrane is impermeable to most ions. An ion channel is needed for cations and anions to cross the membrane, thus they can't freely pass the plasma membrane. Axons of neurons lack specific permeability for anions - which might explain why your asking this question and why you think cells lack anionic permeability (which they don't). Ion channels in the axon have pores with high concentrations of negatively charged amino acids on the cellular and extracellular sides of the channel. This causes a repulsion of anion's while attracting cations, however being simple diffusion it's important not to suggest that the cations are being sucked out like a vacuum, the concentration gradient plays a predominant when dictating which ions and how fast they will be diffusion into our out of the cell.
What is an an anion?
AnionA negatively charged ion. For further information you can say PANC (Positive Anode and Negative Cathode). This is used in electric cell. Anions attract to Anode and Cations attract to Cathode.
What is meant by anode and cathode?
Anode is positive electrode which attracts the negative anions while cathode is the negative electrode which attracts the positive cations during electrolysis.
What is the sign convention for the cathode and anode in an electrolytic cell?
Anode is the positive electrode while cathode is the negative electrode. Negative ions(anions) travel towards the anode(hence the name) Positive ions(cations) travel towards the cathode(hence the name) Example for anode:Copper Example for cathode:Zinc
What does the number of chromosomes in a human body cell equal?
46
Does the number of chromatin in a cell vary depending on the function of the cell?
All cells in a body have equal number of chromatins(hence chromosomes).
