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Biological membranes are said to have what When some substances can pass across them but others cannot?
Wiki User
∙ 13y ago
Semi-permeable membranes, crucial to osmotic processes.
Wiki User
∙ 13y ago
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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.
Lipids are described as being what or water-hating?
Lipids are hydrophobic macromolecules. Literally it means "fear of water", and that water cannot easily diffuse across lipid membranes.
What is the function of a transport protein?
Transport protein provide channels for certain solutesTransport proteins are embedded in cellular membranes. They permit the passage across the membrane of substances that cannot pass through the phospholipid bilayer.Substances may pass through transport proteins by diffusion (often called facilitated diffusion because these substances cannot pass through any other part of the membrane) or by active transport.Transport proteins are subdivided into categories, such as channel proteins and carrier proteins, depending on details of their functioning.
Is transport a function of a protein?
Transport protein provide channels for certain solutesTransport proteins are embedded in cellular membranes. They permit the passage across the membrane of substances that cannot pass through the phospholipid bilayer.Substances may pass through transport proteins by diffusion (often called facilitated diffusion because these substances cannot pass through any other part of the membrane) or by active transport.Transport proteins are subdivided into categories, such as channel proteins and carrier proteins, depending on details of their functioning.
Why is a diet containing no lipids unhealthy?
You cannot survive without lipids. If you were to live on a diet with no lipids whatsoever, your body would soon struggle to maintain itself. All cell membranes are made from lipids, as are the internal compartment membranes. These membranes are essential for almost all biological functions. Linoleic acid is an example of a lipid that is found in these membranes that your body cannot produce and must come from your diet. Linoleic acid, and other omega-6 fatty acids, were once considered to be vitamins themselves. Some lipids are also required for effective absorption of other dietary vitamins.
What substances can pass across them but others cannot?
semi-permeable membranes
When some substances can pass across them but others cannot biological membranes are said to have?
They are said to have semi-permeable membranes.That is,they allow some substances to pass through & prevent others due to the nature & composition of that substance.
What does it mean to say most biological membranes are selectively permeable?
Selectively permeability is a property of biological membranes that allows them to regulate the passage of substances across them. In spite of heavy traffic through them, cell membranes are selectively permeable, and substances do not cross the barrier indiscriminately.
When some substances can pass across them but others cannot?
membrane
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.
Lipids are described as being what or water-hating?
Lipids are hydrophobic macromolecules. Literally it means "fear of water", and that water cannot easily diffuse across lipid membranes.
What is the function of a transport protein?
Transport protein provide channels for certain solutesTransport proteins are embedded in cellular membranes. They permit the passage across the membrane of substances that cannot pass through the phospholipid bilayer.Substances may pass through transport proteins by diffusion (often called facilitated diffusion because these substances cannot pass through any other part of the membrane) or by active transport.Transport proteins are subdivided into categories, such as channel proteins and carrier proteins, depending on details of their functioning.
Is transport a function of a protein?
Transport protein provide channels for certain solutesTransport proteins are embedded in cellular membranes. They permit the passage across the membrane of substances that cannot pass through the phospholipid bilayer.Substances may pass through transport proteins by diffusion (often called facilitated diffusion because these substances cannot pass through any other part of the membrane) or by active transport.Transport proteins are subdivided into categories, such as channel proteins and carrier proteins, depending on details of their functioning.
State one possible reason a certain substance cannot pass across a cellmembrane?
One possible reason behind the inability of a certain substances to pass across a cell membrane is molecule size.
Why is a diet containing no lipids unhealthy?
You cannot survive without lipids. If you were to live on a diet with no lipids whatsoever, your body would soon struggle to maintain itself. All cell membranes are made from lipids, as are the internal compartment membranes. These membranes are essential for almost all biological functions. Linoleic acid is an example of a lipid that is found in these membranes that your body cannot produce and must come from your diet. Linoleic acid, and other omega-6 fatty acids, were once considered to be vitamins themselves. Some lipids are also required for effective absorption of other dietary vitamins.
Substances that cannot be broken down chemically into substances are?
Elements.
What is the name for a substance cannot be separated into simpler substances?
An element cannot be separated into simpler substances by chemical means.
