0
What proteins act like selective passageways in the cell membrane?
Wiki User
∙ 8y ago
The lipid bilayer is a tightly packed membrane of hydrophobic (dont like water) molecules, so only hydrophobic or very very small molecules can go directly through it. Large molecules such as hormones need to have a special hole in the membrane that they can fit through, but some are so large that if the membrane created a plain old hole, everything would be able to fit through, even things the cell doesnt want.
The proteins create special openings that allow only a specific variety of molcule to go through, like only a special type of hormone. They work a lot like a lock and key, so when the molecule encounters its protein, it acts like a key and opens the portal. once the molecule passes, the protein closes the opening and nothing else can go through.
Wiki User
∙ 13y ago
Wiki User
∙ 8y agoProteins that act like selective passageways in the cell membrane are known as carrier proteins. They allow substances to get in and out of the cell.
They are known as CHANNEL PROTEINS!! :)
channel proteins
Channel Proteins
Channel proteins
Wiki User
∙ 10y agoProteins that have a hydrophobic middle flanked by hydrophilic ends.
Wiki User
∙ 10y agoChannel Proteins Or Transport Proteins.
Wiki User
∙ 12y agoAquapore for water
Add your answer:
Earn +20 pts
What functions do proteins have in the cell membrane?
Receptors, Selective Channels and pores
A membrane at the boundry of every cell that acts as a selective barrier?
The membrane at the boundary of every cell that acts as a selective barrier is called the cell membrane. The cell membrane is made of compounds called proteins and lipids.
Which cell structure controls what enters and leaves the cell?
The selective permeability of the cell membrane
What is a selective barrier regulating the passage of materials into and out of the cell?
In a plant cell, this selective barrier is known as the cell membrane but also a plant cell has a cell wall. The cell membrane is semi permeable allowing only certain materials so the cell membrane allows in materials and the cell wall ''digests it''. While in a plant cell does not have a cell wall only a cell membrane.It is the cell membrane that acts as its selective barrier.
Which part of the cell allows for selective permeability?
Cell membrane
These structure are passageways from the nucleus that transport proteins through the cell?
cell membrane
What functions do proteins have in the cell membrane?
Receptors, Selective Channels and pores
What is the characteristic of a cell membrane that controls which substances that can either enter and exit the cell?
Selective permeable
Structure that makes proteins and lipids and that contains passageways through which substances move form place to place in the cell?
The cell membrane.
What is passageways that carry proteins and other materials from one part of a he cell to another?
endoplasmic reticulum
A membrane at the boundry of every cell that acts as a selective barrier?
The membrane at the boundary of every cell that acts as a selective barrier is called the cell membrane. The cell membrane is made of compounds called proteins and lipids.
What molecules in membrane give them their specific function describe activities of one of these molecules?
Direct activities of the cell give the function of the cell membrane. Globular proteins create narrow passageways or channels. The nucleus directs the cell's functions.
What makes up a selectively permeable membrane?
Plasma membrane filters what the cell needs and keeps out what will harm it. this property is called selective permeability.
Which cell structure controls what enters and leaves the cell?
The selective permeability of the cell membrane
What is a selective barrier regulating the passage of materials into and out of the cell?
In a plant cell, this selective barrier is known as the cell membrane but also a plant cell has a cell wall. The cell membrane is semi permeable allowing only certain materials so the cell membrane allows in materials and the cell wall ''digests it''. While in a plant cell does not have a cell wall only a cell membrane.It is the cell membrane that acts as its selective barrier.
Which part of the cell allows for selective permeability?
Cell membrane
What is the name of the cell proteins and a lipid bilayer barrier?
cell membrane
