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What are the different types of cell transport?
active transport -transport against concentration gradient that requires chemical energy passive transport- requires no energy at all
Identify the four basic mechanism molecules use to move through a cell membrane and also discuss them?
the four basic mechanisms are 1 diffusion which is the net movement of molecules from a region of high concentration to a region of lower concentration down a concentration 2 osmosis which is the movement of water molecules from a region of higher concentration to that of a lower concentration through a selectively permeable membrane 3 active transport 4 bulk transport
What factors affect bulk transport?
i) active transport, ii) passive transport, and iii) diffusion. Answer 2 Above given are processes of transport not factors . Factors include 1: concentration gradient 2 : Temperature , 3 :Surface area .
What if a cell has a lower concentration outside the cell?
There are two basic ways that individual molecules can enter (or leave) a cell.1. Diffusion. This is the movement of particles from a region of high concentration to a region of low concentration. So if the concentration of the molecule is higher outside the cell it can enter by diffusion. However diffusion can only take place down a concentration gradient ie from a high to a low concentration.2. Active transport. This is the movement of particles against their concentration gradient (ie from a low to a high concentration), using energy provided by the cell (ie ATP produced by respiration). So if a molecule is at a higher concentration inside the cell it can only be absorbed by active transport.
What is the function of cell membane in movement of the substances in and out of the cell?
The cell membrane behave as a living barrier for the flow of movement of substance in and out of the cell. Cell membrane containg small pore of approximately 8-10 Ao wide pores. Thus the molecule only of this size and smaller then this can pass through the cell membrane in bulk and permeable transport. The transport although mainly occurs in two ways by passive transport in which no energy is needed and molecules or substances are transported in flow of concentration gradient. Second is active transport in which energy is needed (in eukaryotes energy is provided by ATP and in prokaryotes it is generally comes from proton motive force) and substance or molecules move against the concentration gradient e.g. Na-K exchange pump.
What is A cell moving particles with the use of energy is called?
Active transport: The movement of particles against the concentration gradient into or out of a cell. Bulk transport:The movement of large molecules into or out of the cell. Both of these require energy
How can molecules move without diffusion or osmosis?
Apart from osmosis and diffusion the major mechanism for individual molecules to move is by active transport. Active transport is the movement of molecules against their concentration gradient (from a low to a high concentration) using energy supplied by the cell. It differs from diffusion which can only work down a concentration gradient ie from a high concentration to a low concentration. It also needs a source of energy supplied by a living cell, which is not needed for difusion. In cells, energy for active transport is supplied by respiration. See http://www.bbc.co.uk/schools/gcsebitesize/biology/cellprocesses/2diffusionandosmosisrev1.shtml
What are the different types of cell transport?
active transport -transport against concentration gradient that requires chemical energy passive transport- requires no energy at all
What is the movement of material through a membrane?
The movement of material through a membrane can occur via passive processes such as diffusion and osmosis, where substances move down their concentration gradient without requiring energy input. Active transport, on the other hand, involves the use of energy to move substances against their concentration gradient. Facilitated diffusion involves the use of carrier proteins to help transport specific molecules across the membrane.
Passive and active transport?
Active Transpot. -Pumps -Endocytosis -Exocytosis Passive Transport - Diffusion -osmosis -Facilitated Diffusion active requires energy passive doesnt. active against concentration gradient, passive along concentration gradient.
Identify the four basic mechanism molecules use to move through a cell membrane and also discuss them?
the four basic mechanisms are 1 diffusion which is the net movement of molecules from a region of high concentration to a region of lower concentration down a concentration 2 osmosis which is the movement of water molecules from a region of higher concentration to that of a lower concentration through a selectively permeable membrane 3 active transport 4 bulk transport
What are 2 types of active transport?
A) Active transport through special transport proteins in the plasma membrane. ATP causes these proteins to change shapes and move materials from low to high concentration. B) Bulk transport - moving large particles through the membrane by endocytosis or exocytosis.
What factors affect bulk transport?
i) active transport, ii) passive transport, and iii) diffusion. Answer 2 Above given are processes of transport not factors . Factors include 1: concentration gradient 2 : Temperature , 3 :Surface area .
Is the transporting of molecules from the blood capillaries to body tissuse by active transport or bulk transport?
Neither except in the case of the sodium potassium pump. Transport of "molecules" is by osmotic pressure at the capillary bed and by and concentration gradient/ diffusion at the actual cell membranes.
Why mitochondrion is called powerhouse of the cell?
Mitochondria are the powerhouses of cells because they are the epicenter of the electron transport chain. While glycolysis can occur in the cytoplasm, the bulk of energy production takes place due to a hydrogen concentration gradient found in the mitochondria.
Explain the differences between osmosis diffusion active transport and bulk transport and give examples of materials exchanged by different methods with a justification in each case?
In diffusion, molecules travel from a higher concentration to a lower concentration. When you put a drop of ink in a glass of water, the spreading of the ink in the water is called diffusion. Similarly, if you spray an air freshener in one corner of a room, eventually people on the other side of the room will be able to smell it as well because the scent has diffused. In osmosis, molecules also travel from higher concentration to a lower concentration. However, osmosis specifically refers to the movement of WATER molecules. Both of these types of transport are examples of passive transport, which requires no energy
What if a cell has a lower concentration outside the cell?
There are two basic ways that individual molecules can enter (or leave) a cell.1. Diffusion. This is the movement of particles from a region of high concentration to a region of low concentration. So if the concentration of the molecule is higher outside the cell it can enter by diffusion. However diffusion can only take place down a concentration gradient ie from a high to a low concentration.2. Active transport. This is the movement of particles against their concentration gradient (ie from a low to a high concentration), using energy provided by the cell (ie ATP produced by respiration). So if a molecule is at a higher concentration inside the cell it can only be absorbed by active transport.
