0
What else can I help you with?
What do you call substances that will not let thermal heat pass through them?
thermal insulator
What term describes a cell membrane's ability to let substances through?
Selective permeability is the term that describes a cell membrane's ability to allow certain substances to pass through while blocking others. This is essential for maintaining cellular function and regulating the internal environment of the cell.
Can CO2 pass through the phospholipid bilayer?
oxygen
What does it mean for phospholipid membrane to be selectively permeable?
It only let's some materials pass in and out.
How does lipid solubility affect the ability of substances entering a cell?
Lipid-soluble substances can easily pass through the cell membrane due to the presence of phospholipids that make up the membrane. These substances can dissolve in the lipid bilayer and diffuse through it, allowing them to enter the cell more readily. In contrast, substances that are not lipid-soluble may require specific transport mechanisms to facilitate their entry into the cell.
Can polar molecules pass through the phospholipid bilayer?
Yes, polar molecules can pass through the phospholipid bilayer through facilitated diffusion or active transport.
Do all substances pass freely between the intracellular and extracellular fluids through a phospholipid bilayer?
No, not all substances can pass freely through the phospholipid bilayer of a cell membrane. Small, non-polar molecules like oxygen and carbon dioxide can diffuse across easily, while larger molecules and charged ions require specialized transport mechanisms such as channels or carriers to move in and out of cells.
Which molecule among the following will not pass through the phospholipid bilayer of a membrane?
The molecule that will not pass through the phospholipid bilayer of a membrane is a large and polar molecule.
What do you call substances that will not let thermal heat pass through them?
thermal insulator
How does salts enter the cell?
Salts are soluble. The phospholipid bilayer membrane of cell walls are permeable to water and thus allow water and water-soluble substances, like salts, diffuse through.
What term describes a cell membrane's ability to let substances through?
Selective permeability is the term that describes a cell membrane's ability to allow certain substances to pass through while blocking others. This is essential for maintaining cellular function and regulating the internal environment of the cell.
Can CO2 pass through the phospholipid bilayer?
oxygen
What are 2 characteristics of substances that do not allow them to pass through semipermeable membranes of living cells?
Large molecular size and hydrophobicity are two characteristics that prevent substances from passing through semipermeable membranes of living cells. Large molecules cannot fit through the small pores of the membrane, while hydrophobic molecules are repelled by the hydrophilic nature of the phospholipid bilayer.
The phospholipid sea in which embedded substances float?
The phospholipid bilayer of the cell membrane, also known as the lipid bilayer, is where embedded substances like proteins and cholesterol float. This fluid mosaic model allows for dynamic movement of molecules within the membrane. The hydrophobic tails of the phospholipids form a barrier that helps control the passage of substances in and out of the cell.
What does it mean for phospholipid membrane to be selectively permeable?
It only let's some materials pass in and out.
How does lipid solubility affect the ability of substances entering a cell?
Lipid-soluble substances can easily pass through the cell membrane due to the presence of phospholipids that make up the membrane. These substances can dissolve in the lipid bilayer and diffuse through it, allowing them to enter the cell more readily. In contrast, substances that are not lipid-soluble may require specific transport mechanisms to facilitate their entry into the cell.
Which part of a cell controls what gets in and out?
The plasma membrane / cell surface membrane. The phospholipid bilayer prevents certain substances passing straight through, so protein channels and other mechanisms control what does and does not pass in and out of the cell.
