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What 3 ways can substances enter and leave a cell?
Substances can move in and out of a cell in several ways. Diffusion is when a substance will distribute itself in or out of a cell until the distribution on both sides of the cell is balanced. Active transport is when a cell transports a substance across the cell membrane that would not normally be able to pass through. Osmosis is the movement of water from areas with few dissolved dissolved substances to areas with high dissolved substances.
What does active transport and facilitated diffusion have in common?
Both active transport and facilitated diffusion are methods of moving substances across cell membranes. Active transport requires energy input to move substances against their concentration gradient, while facilitated diffusion does not require energy and moves substances along their concentration gradient with the help of transport proteins.
What is a major difference between facilitate diffusion and active transport?
Active transport moves substances against the concentration gradient.
How does diffusion from active transport?
Active transport expends energy, unlike osmosis and diffusion. Active transport is a way to move substances against concentration gradients in the cell membrane, so they need more energy to do so.
During active transport substances move from regions of what?
in active transport, where do molecules always go
Is active transport the only way substances can cross the intestinal membrane?
No. There is passive, diffusion.
Is active transport the only way substances can cross the intestinal membranes?
Diffusion too.
How is facilitated diffusion similar to active transport in terms of their mechanisms of moving substances across the cell membrane?
Facilitated diffusion and active transport are similar in that they both involve the movement of substances across the cell membrane with the help of specific proteins. However, facilitated diffusion does not require energy, while active transport does require energy in the form of ATP to move substances against their concentration gradient.
How do facilitated diffusion and active transport compare and contrast in terms of their mechanisms of transport across the cell membrane?
Facilitated diffusion and active transport are both ways that substances move across the cell membrane, but they differ in their mechanisms. Facilitated diffusion uses protein channels to help substances passively move from areas of high concentration to low concentration, while active transport requires energy to move substances against their concentration gradient using protein pumps.
How are substances and structures transported within the cell?
Substances and structures are transported within the cell through processes such as diffusion, facilitated diffusion, active transport, and vesicular transport. Diffusion involves the movement of molecules from an area of high concentration to low concentration. Facilitated diffusion uses protein channels to help substances across the cell membrane. Active transport requires energy to move molecules against their concentration gradient. Vesicular transport involves the formation of vesicles that transport substances within or out of the cell.
What is net movement of substances across plasma membrane without additional energy?
Diffusion. With the need of energy, it would be called active transport.
Is active transport opposite from diffusion?
Yes, active transport is essentially the opposite of diffusion. While diffusion is a passive process that allows substances to move from areas of higher concentration to areas of lower concentration without the need for energy, active transport requires energy to move substances against their concentration gradient, from areas of lower concentration to areas of higher concentration. This energy is typically provided by ATP.
