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Yes, diffusion can be described as the process where substances move from an area of high concentration (or density) to an area of low concentration (or density). This movement occurs due to the random motion of particles, leading to a net flow that equalizes concentrations over time. This principle applies to gases, liquids, and even solids under certain conditions.
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What is the net movement of substances to regions of lower concentration called?
This process is called diffusion. If the substance moving is water, it is called osmosis.
What is substances move into cell without the cell using energy?
The names of these processes are diffusion or osmosis (osmosis is the diffusion of water molecules only). These are both passive and so do not require any energy. However, facilitated diffusion using carrier and channel proteins is also a passive process of moving substances across the cell membrane.
Would you expect osmosis and diffusion to the stop when substances are evenly distributed?
Yes, osmosis and diffusion would theoretically slow down and eventually stop when substances are evenly distributed. This is because there would be no concentration gradient, which is necessary for osmosis and diffusion to occur.
How do the called the Process of moving substances over the cell membrane?
The process of moving substances across the cell membrane is called "transport." This can occur through various mechanisms, including passive transport (such as diffusion and osmosis) and active transport, which requires energy to move substances against their concentration gradient. Additionally, facilitated diffusion involves specific transport proteins to help substances cross the membrane. Together, these processes maintain the cell's internal environment and enable communication and nutrient uptake.
Explain why diffusion is evidence for particle models?
Diffusion occurs because particles move randomly in all directions until they are evenly distributed. This can be explained by the particle model, which states that matter is made up of tiny particles that are constantly in motion. The movement of particles in diffusion supports the idea that substances are composed of particles that are constantly moving.
What are the processes involved in moving substances across the cell membrane?
Diffusion
What is the net movement of substances to regions of lower concentration called?
This process is called diffusion. If the substance moving is water, it is called osmosis.
How would you best describe simple diffusion?
Substances moving down a concentration gradient passively.
What is passive transpot?
Passive transport is the movement of substances across a cell membrane without the use of energy. It occurs along a concentration gradient, with substances moving from an area of high concentration to an area of low concentration. Examples include diffusion and facilitated diffusion.
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.
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.
Moving substances from a lower concentration to a higher concentration requires . passive diffusion facilitated diffusion active transport pinocytosis?
Active transport. This process uses energy to pump substances against their concentration gradient, allowing them to move from areas of lower concentration to higher concentration.
What is substances move into cell without the cell using energy?
The names of these processes are diffusion or osmosis (osmosis is the diffusion of water molecules only). These are both passive and so do not require any energy. However, facilitated diffusion using carrier and channel proteins is also a passive process of moving substances across the cell membrane.
Would you expect osmosis and diffusion to the stop when substances are evenly distributed?
Yes, osmosis and diffusion would theoretically slow down and eventually stop when substances are evenly distributed. This is because there would be no concentration gradient, which is necessary for osmosis and diffusion to occur.
How do the called the Process of moving substances over the cell membrane?
The process of moving substances across the cell membrane is called "transport." This can occur through various mechanisms, including passive transport (such as diffusion and osmosis) and active transport, which requires energy to move substances against their concentration gradient. Additionally, facilitated diffusion involves specific transport proteins to help substances cross the membrane. Together, these processes maintain the cell's internal environment and enable communication and nutrient uptake.
What is the pathway of movement for substances traveling across a capillary wall?
Capillaries have very thin walls which are semi-permeable.
How is active transport similar to facilitated diffusion in terms of their mechanisms of moving substances across the cell membrane?
Active transport and facilitated diffusion are both mechanisms used by cells to move substances across the cell membrane. Both processes require the use of specific proteins embedded in the cell membrane to facilitate the movement of substances. However, the key difference between the two is that active transport requires energy input from the cell to move substances against their concentration gradient, while facilitated diffusion does not require energy and moves substances down their concentration gradient.
