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Water moves across plasma membranes due to "Osmosis". Water may also move through the plasma membrane by flowing down a gradient from outside the cell into the inside of the cell since there is a less concentration of of water inside the cell (there are more things in the cell other than water such as proteins, hormones, and other substances).
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Is it true that Movement of water across the plasma membrane depends on the relative concentration of solutes or dissolved substances?
Yes, the movement of water across the plasma membrane, known as osmosis, depends on the relative concentration of solutes. Water will move from an area of lower solute concentration to an area of higher solute concentration in an attempt to balance the solute concentrations on both sides of the membrane.
When ions move across a plasma membrane what will happen?
When ions move across a plasma membrane, it can create changes in membrane potential and can trigger physiological responses within the cell. The movement of ions is essential for functions such as nerve signaling, muscle contraction, and maintaining osmotic balance. Transport of ions across the membrane is tightly regulated to maintain cellular homeostasis.
Do enzymes change shape to move substances across the plasma membrane?
Enzymes and the substrates they work on fit like a lock and key, if you change the shape of the key, the lock won't open. An enzyme whose shape changes is no longer able to activate the reaction of the substrate.
What process does water use to move across the plasma?
Water moves across the plasma membrane primarily through a process called osmosis, which is the diffusion of water molecules from an area of lower solute concentration to an area of higher solute concentration. This movement occurs through specialized protein channels known as aquaporins, which facilitate the rapid passage of water. Additionally, water can also move through the lipid bilayer of the membrane, although to a lesser extent. Overall, the process is crucial for maintaining cellular homeostasis and regulating fluid balance.
What type of membran proteins are integral proteins that move ions or molescules across plasma membrane?
Integral proteins that move ions or molecules across the plasma membrane are primarily known as transport proteins. These include channel proteins, which form pores to allow specific ions or water to pass through, and carrier proteins, which bind to molecules and undergo conformational changes to transport them across the membrane. Together, they facilitate essential processes like facilitated diffusion and active transport, maintaining cellular homeostasis.
What is the process that utilizes a carrier to move marerials across the plasma membrane in the direction of the concentration?
Diffusion is what carries materials across the plasma membrane. The diffusion cannot be moved across water.
What is the process that utilizes a carrier to move materials across the plasma membrane in the direction of the concentration gradient that does not use ATP?
Active Transport
Does carbon dioxide and bicarbonate anions move in the same direction across the plasma membrane of an erythrocyte?
Carbon dioxide enters the erythrocyte and reacts with water to form bicarbonate ions, which then exit the erythrocyte. So, they move in opposite directions across the plasma membrane of an erythrocyte.
How does lipid soluble move across the plasma membrane?
by dissolving in the lipid bilayer.
Describe how dissolved particles move across a plasma membrane form regions of lower to higher concentrations?
Things move across the membrane from lower to higher concentrations by active transport.
Is it true that Movement of water across the plasma membrane depends on the relative concentration of solutes or dissolved substances?
Yes, the movement of water across the plasma membrane, known as osmosis, depends on the relative concentration of solutes. Water will move from an area of lower solute concentration to an area of higher solute concentration in an attempt to balance the solute concentrations on both sides of the membrane.
Why is it necessary for movement across a plasma membrane?
There are many reasons to move things across the plasma membrane. Any molecule that is soluble in water cannot cross the plasma membrane because the inner layer is hydrophobic (repels water). This includes molecules that are critical for cell survival, such as positively charged ions such as sodium and calcium, as well as water and glucose. All of these substances must be passed across passively (without energy expenditure) or actively (with energy expenditure). These processes are generally carried out by specific proteins, which provide a hydrophilic (water loving) path or channel through the membrane.
When ions move across a plasma membrane what will happen?
When ions move across a plasma membrane, it can create changes in membrane potential and can trigger physiological responses within the cell. The movement of ions is essential for functions such as nerve signaling, muscle contraction, and maintaining osmotic balance. Transport of ions across the membrane is tightly regulated to maintain cellular homeostasis.
Active transport requires what?
Energy-requiring process by which substances move across the plasma membrane against a concentration gradient.
The process that utilizes a transporter to move materials across the plasma membrane against the concertration gradient using ATP?
diffusion
Do enzymes change shape to move substances across the plasma membrane?
Enzymes and the substrates they work on fit like a lock and key, if you change the shape of the key, the lock won't open. An enzyme whose shape changes is no longer able to activate the reaction of the substrate.
What process does water use to move across the plasma?
Water moves across the plasma membrane primarily through a process called osmosis, which is the diffusion of water molecules from an area of lower solute concentration to an area of higher solute concentration. This movement occurs through specialized protein channels known as aquaporins, which facilitate the rapid passage of water. Additionally, water can also move through the lipid bilayer of the membrane, although to a lesser extent. Overall, the process is crucial for maintaining cellular homeostasis and regulating fluid balance.
