0
What else can I help you with?
Why do Ions and polar molecules require transport proteins to enter or leave a cell?
Not necessarily. It helps to be polar because the lipid bilayer is polar and it helps to pull molecules through, but if its a molecule that the cell doesn't want it wont pull it through. Water (a polar molecule) can go through the membrane anywhere but other nutrients need the help of transport proteins.
What type of molecules enter the cell through passive transport List at least three?
Small nonpolar molecules like oxygen and carbon dioxide, as well as water molecules, can enter the cell through passive transport. Other examples include lipids and ethanol.
How do small polar molecules pass through the cell membrane?
Small polar molecules can pass through the cell membrane by using protein channels or carriers that facilitate their movement across the lipid bilayer. These channels and carriers help the molecules navigate through the hydrophobic interior of the membrane, allowing them to enter or exit the cell as needed.
What brings nonspecific material into a cell?
Nonspecific material can enter a cell through processes like pinocytosis, where the cell engulfs extracellular fluid and whatever molecules are present within it. This material is then enclosed in a vesicle and transported into the cell.
Can polar molecules cross the cell membrane?
Yes, polar molecules can cross the cell membrane through facilitated diffusion or active transport.
What type of molecules cannot enter the cell?
polar molecules are repelled by the cells electrical charge.
How does the cell membrane regulate what enters and leaves the cell membrane?
Cell membrane have proteins embedded in them that act as channels for things to enter and leave the cell. Furthermore, the fact that the membrane is non-polar will block any polar molecules from entering but will allow non-polar molecules such as hormones to enter.
Are bilipid layers normally permeable to small or large molecules?
Bilipid layers are selectively permeable to small molecules that are non-polar or lipid-soluble, while they generally restrict the passage of large molecules and polar compounds. This selective permeability allows for the regulation of what substances can enter and exit the cell.
Large molecules are surrounded by the cell membrane and enter the cell?
Large molecules can enter cells through processes like endocytosis, where the cell membrane surrounds the molecule and engulfs it in a vesicle. This allows large molecules to be transported into the cell without crossing the lipid bilayer of the membrane.
Why do Ions and polar molecules require transport proteins to enter or leave a cell?
Not necessarily. It helps to be polar because the lipid bilayer is polar and it helps to pull molecules through, but if its a molecule that the cell doesn't want it wont pull it through. Water (a polar molecule) can go through the membrane anywhere but other nutrients need the help of transport proteins.
Which substances passes most readily into a cell ions large molecules glucose carbon dioxide or polar molecules?
Ions
What type of molecules enter the cell through passive transport List at least three?
Small nonpolar molecules like oxygen and carbon dioxide, as well as water molecules, can enter the cell through passive transport. Other examples include lipids and ethanol.
What large molecules need help getting across cell membrane?
In general, molecules that cannot diffuse across the cell membrane are either very large, such as starches and fats, or very polar.
What part of the membrane helps large carbohydrate molecules enter the cell?
Globular proteins
How do small polar molecules pass through the cell membrane?
Small polar molecules can pass through the cell membrane by using protein channels or carriers that facilitate their movement across the lipid bilayer. These channels and carriers help the molecules navigate through the hydrophobic interior of the membrane, allowing them to enter or exit the cell as needed.
What part of the membrane would help a large carbohydrate molecules enter the cell?
Globular proteins
What is the process by which large molecules enter a cell through pouches in the membrane?
The process by which large molecules enter a cell through pouches in the membrane is called endocytosis. During endocytosis, the cell membrane forms a pouch around the molecule, encloses it, and brings it into the cell as a vesicle. This allows the cell to take in larger molecules that would not be able to pass through the membrane on their own.
