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How will an increase in cholesterol content in the plasma membrane affect the overall properties and functions of the membrane?
An increase in cholesterol content in the plasma membrane can make the membrane more rigid and less permeable. This can affect the membrane's ability to transport molecules, communicate with other cells, and maintain its structure.
What part of the cell allows for substance to go in and out of it?
The cell membrane controls the movement of substances in and out of the cell. It is selectively permeable, allowing certain molecules to pass through while blocking others. This regulation helps maintain internal conditions necessary for the cell to function properly.
What is a membrane that allows some substances to pass through but excludes others?
A membrane that lets some substances pass through but not others is known as a semipermeable membrane. Other terms that describe this type of membrane are: selectively permeable, partially permeable, or differentially permeable.
When a cell grows its plasma membrane expands does it involve exocytosis or endocytosis please explain?
I believe it's endocytosis, Because the cell takes in the food or the (transport) vesicles to grow " by the three types of endocytosis: Phagocytosis " Cellular eating " Pinocytosis " Cellular drinking " and " Receptor-mediated endocytosis " And they will fuse with the plasma membrane and become part of it, so accordingly, the plasma membrane is expanding.
What is the effect of increased cholesterol in the plasma membrane on the overall structure and function of the membrane?
Increased cholesterol in the plasma membrane can lead to a more rigid and less fluid membrane structure. This can affect the membrane's ability to allow substances to pass through and communicate with other cells, potentially impacting overall cell function.
How will an increase in cholesterol content in the plasma membrane affect the overall properties and functions of the membrane?
An increase in cholesterol content in the plasma membrane can make the membrane more rigid and less permeable. This can affect the membrane's ability to transport molecules, communicate with other cells, and maintain its structure.
Why is The plasma membrane is much more permeable to K than to Na?
Even when both those atoms are encapsulated with water, potassium is smaller than sodium.
What part of the cell allows for substance to go in and out of it?
The cell membrane controls the movement of substances in and out of the cell. It is selectively permeable, allowing certain molecules to pass through while blocking others. This regulation helps maintain internal conditions necessary for the cell to function properly.
Why is the plasma membrane more permeable to potassium ions than sodium ions?
Some substances, including sodium and potassium, use a process called active transport to permeate cell walls. Active transport is controlled by other body systems. It limits the quantity of these substances passing through the plasma membrane to match the needs of the body.
What effect will more cholesterol in the plasma membrane have on the membrane?
It will cause it to become rigid
Do eukaryotic plasma membranes contain cholesterol which makes the membrane more stable?
Yes, it does make the membrane more stable because the cholesterol is wedged into the bilayer squeezing it and stabilizing the phospholipid and keeping the membrane fluid below 37 degrees celcius.
Is the structure of the plasma membrane sealed tight?
The plasma membrane is not sealed tight; rather, it is a selectively permeable barrier composed of a lipid bilayer with embedded proteins. This structure allows certain molecules to pass through while preventing others, facilitating communication and transport. While some regions may be more tightly packed, the overall membrane is fluid and dynamic, enabling flexibility and the movement of substances.
What is a membrane that allows some substances to pass through but excludes others?
A membrane that lets some substances pass through but not others is known as a semipermeable membrane. Other terms that describe this type of membrane are: selectively permeable, partially permeable, or differentially permeable.
When a nerve is activated by a threshold stimulus the membrane becomes more permeable to?
Potassium and Sodium
When is a neurolemma more permeable to potassium than sodium?
The neurolemma is more permeable to potassium than sodium during the resting state of a neuron, known as the resting membrane potential. This is due to the presence of leak potassium channels that allow potassium ions to move more freely across the neurolemma, contributing to the negative charge inside the neuron.
Are Excitable cells like neurons are more permeable to sodium than to potassium?
Yes, excitable cells like neurons are more permeable to sodium ions than potassium ions. This selective permeability is due to the presence of more sodium channels compared to potassium channels in the cell membrane, allowing sodium to flow into the cell more readily during an action potential.
Two liquids are sepertated by a membrane that is not permeable one liquid has a high concentration of salt the other liquid is plain water you can expect?
If the membrane is not permeable to either sodium and chloride ions or water then the concentrations of the liquids would remain the same. However, if the membrane was permeable to water or the ions then the plain water would become more salty while the salty water would become more dilute (due diffusion/osmosis, depending on the membrane's permeability).
