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Glucose...It's a HUGE molecule that is broken down into Glycogen for storage.
Wiki User
∙ 15y ago
Wiki User
∙ 9y agoPolysaccharides are organic substances that are too large for carrier proteins. Before they can enter cell membranes, the polysaccharides need to be broken down.
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Why cant glucose be able to move across a cell membrane by simple diffusion?
the lipid bilayer forms a barrier to water soluble substances such as glucose
How do carrier proteins help substances enter the cell?
1) Carrier protein ONLY transport the non-polar substance such as glucose,except water,because water particles could slide through phospholipid bilayer across plasma membrane from the area of high concentration to the area of lower concentration. 2) Substance which pass through phospholipid bilayer bind at specific sites. 3) Carrier protein will change its shape appropriately to the shape of the substance passing through plasma membrane.
Why can't proteins be absorbed into the bloodstream?
They are too large and have to be broken down into amino acids.
Does facilitated diffusion require membrane proteins?
NO, it does not always require a carrier protein!!
What are the substances reabsorbed in distal convoluted tubule?
When blood is filtered at the glomerulus (filter unit) of the kidney, some substances don't even make it into the nephron. These include proteins, which are simply too big to diffuse from the capillaries and across the Bowman's capsule. As for what substances are reabsorbed (by active transport) into the bloodstream from the nephron, these include glucose, which is too valuable to be lost in urine. Urea and other substances are lost in the urine.
Why are proteins and polysaccharides cannot be transported across a cell membrane by carrier proteins?
They are too large to be transformed by carrier proteins. They are moved across by Vesicles instead.
Why cant glucose be able to move across a cell membrane by simple diffusion?
the lipid bilayer forms a barrier to water soluble substances such as glucose
How do carrier proteins help substances enter the cell?
1) Carrier protein ONLY transport the non-polar substance such as glucose,except water,because water particles could slide through phospholipid bilayer across plasma membrane from the area of high concentration to the area of lower concentration. 2) Substance which pass through phospholipid bilayer bind at specific sites. 3) Carrier protein will change its shape appropriately to the shape of the substance passing through plasma membrane.
Are proteins too large to diffuse in cells?
Proteins are keep the cell going. They have many jobs to do one of which give the cell the energy to do what the cell is program to do in the body. So no proteins are not to large to diffuse in cells
Why can't proteins be absorbed into the bloodstream?
They are too large and have to be broken down into amino acids.
What two structural characteristics of cell membranes determine whether substances can pass through them passively?
Diffusion and Filtration. Diffusion is an important means of passive membrane transport for every cell of the body. The other passive transport process is filtration, generally occurs only across capillary walls.
Why do cell need transport proteins to functions?
Some molecules are too large to pass through the cell membrane without transport proteins.
Why do cells to use transport proteins to function?
Some molecules are too large to pass through the cell membrane without transport proteins.
Does facilitated diffusion require membrane proteins?
NO, it does not always require a carrier protein!!
How does a cell consume a food particle that is too large to pass through a channel proteins?
phagocytosis
Why do cells need to use transport proteins to function's?
Some molecules are too large to pass through the cell membrane without transport proteins.
Why do cells need to use transport proteins to function-?
Some molecules are too large to pass through the cell membrane without transport proteins.
