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What term identifies the concept that some substances can move freely across a cell membrane while other substances must be carried across by proteins?
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∙ 10y ago
selective permeability
Wiki User
∙ 10y ago
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Many functions of the plasma membrane are carried out by?
Most of the active functions of plasma membranes are carried out by proteins.
What Three things that are carried around the body in the blood plasma?
Three substances transported by blood are nutrients, oxygen, and waste from cells.
The structural arrangement of the cell membrane?
the cell membrane is composed of carbohydrates, proteins, and phospholipids. The proteins act as transport molecules to move material in and out of the cell (kind of like a tunnel). They are embedded in the membrane. These proteins are needed due to the phospholipid bilayer. The inside of the bilayer repels water, so this keeps all materials out of the cell unless it has been selected to be carried in by the proteins. The carbohydrates are located on the outside of the membrane. They recognize things the cell may need. For instance, ADH (Anti-diuretic hormone) is only needed in the kidneys, so the carbohydrates only recognize it there.
How do cells get the proteins they need from foods?
enzymes breaks down food proteins into smaller molecules that can be carried by blood
Describe two important processes carried out by proteins?
the two important processes carried out by proteins are growth, repair, digestion, respiration, and the transmissions of nerve impluses
Most membrane functions are carried out by which component of the membrane?
Most membrane functions are carried out by proteins. The cell membrane is important because it protects what is inside the cell from outside damage.
What what are three vital substances that are carried by proteins in the bloodstream?
Oxygen, carbon, and nitrogen are three major substances that are carried by proteins in the bloodstream. These vital substances are considered the building blocks of life, which protein also assists with.Ê
Many functions of the plasma membrane are carried out by?
Most of the active functions of plasma membranes are carried out by proteins.
Why isn't energy required for the passenger molecule to be carried across the cell membrane by the carrier molecule?
it is carring substances both into and out of the cells.
Site from which oxygen enters the pulmonary blood?
Oxygen passes through the membrane by diffusion. Most other molecules must be transported (carried) across by proteins which reside within the cell membrane.
What is the adaptive value of the endomembrane system?
Thickness, molecular composition, and types of chemical reactions carried out by proteins in a given membrane are not fixed, but maybe be modified several times during the membrane's life. - Campell AP biology book
What Three things that are carried around the body in the blood plasma?
Three substances transported by blood are nutrients, oxygen, and waste from cells.
How is water important to your circulatory system?
Water is the largest component of the blood by volume. It provides a matrix for the proteins, cells, and other substances carried by the blood.
The structural arrangement of the cell membrane?
the cell membrane is composed of carbohydrates, proteins, and phospholipids. The proteins act as transport molecules to move material in and out of the cell (kind of like a tunnel). They are embedded in the membrane. These proteins are needed due to the phospholipid bilayer. The inside of the bilayer repels water, so this keeps all materials out of the cell unless it has been selected to be carried in by the proteins. The carbohydrates are located on the outside of the membrane. They recognize things the cell may need. For instance, ADH (Anti-diuretic hormone) is only needed in the kidneys, so the carbohydrates only recognize it there.
What are the two important processes carried out by proteins?
The two important processes carried out by proteins are growth, repair, digestion, respiration, and the transmissions of nerve impluses.
What kind of molecule did scientist first believe carried genetics information?
proteins
How do cells get the proteins they need from foods?
enzymes breaks down food proteins into smaller molecules that can be carried by blood
