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What two structural characteristics of cell membranes determine whether substances can pass through them passively?
Wiki User
∙ 12y ago
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.
Wiki User
∙ 12y ago
Wiki User
∙ 13y agoIt is differentially permeable - large molecules / polar substances cannot pass through the bilipid layer
It has channel proteins between the phospholipid - substances like glucose can move across channel proteins into the cell although they are too large to pass through the bilipid layer
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What describes the major role of lipids within a cell?
They are the main structural components of membranes
Which molecules help control movement of substances through cell membranes?
proteins help control movement of substances through cell membranes.
What supervises the substances entering and exiting the cytoplasm?
Cell membranes
What are three characteristics of cell membranes?
k;j;
What flatten membranes that package cellular substances for export?
Golgi Bodies :)
What characteristics of cell membranes may explain why fat soluble substances such as chloroform and ether rapidly affect cells?
The fact that cell membranes are semi-permiable creates openings for the substances to enter.
What characteristics of cell membranes may explain why fat-soluble substances such as chloroform and ether rapidly affect cells?
The fact that cell membranes are semi-permiable creates openings for the substances to enter.
What are 2 characteristics of substances that do not allow them to pass through semipermeable membranes of living cells?
Substances that are large, charged, or polar
What describes the major role of lipids within a cell?
They are the main structural components of membranes
What characteristics of cell membrane may explain why fat-soluble substances such as chloroform and ether rapidly affect cells?
The fact that cell membranes are semi-permiable creates openings for the substances to enter.
Do All membranes have exactly the same permeability characteristics?
No, membranes
How does the structural organization of membranes provide for transport and recognition?
ikr
What are membranes that allow only certain substances to pass through them?
Semi permeable membranes.
Which molecules help control movement of substances through cell membranes?
proteins help control movement of substances through cell membranes.
What supervises the substances entering and exiting the cytoplasm?
Cell membranes
Solid fats have a high proportion of what?
They make up structural parts of cell membranes
What Solid fats have high proportion of?
They make up structural parts of cell membranes
