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What happens when the concentration of dissolved substances is greater outside the cell than inside?
Water will move out of the cell in an attempt to equalize the concentration of dissolved substances, causing the cell to shrink or shrivel up. This process is known as crenation, and can have negative effects on the cell's functioning.
Are most minerals made of rock?
No. It is more appropriate to say that rocks are naturally occurring substances made up of of minerals.
Facilitated diffusion carrier proteins and cell membrane pumps both?
They both transport substances up their concentration gradients.
How do substances move in diffusion and osmosis?
Diffusion- This is the movement of substances from an area of high concentration to low concentration. Diffusion can be sped up by heat and by increasing the concentration of the diffusing substances. Osmosis-This is the movement of water down a concentration gradient across a semi-permeable membrane. Water crosses the membrane down its concentration gradient, from the side with the lower solute solution to the side with the higher solute solution. This is therefore making the lower solute solution more concentrated, while also diluting the higher solute concentration solution. Osmosis will carry on until equilibriium is reached which is said to be isotonic, when both sides have reached their equal concentrations. Emms B x
How are the concentration gradients in the alveoli maintained?
The heart is constantly pumping blood around the body. blood entering the lungs is deoxygenated and high in C02 The air in the alveoli has a high oxygen concentration and in comparison is low in C02 This sets up a concentration gradient. This causes oxygen to diffuse into the RBC and C02 to diffuse out in order to try balance the concentration. This balance is maintained by breathing, taking away the C02 in the lungs and bringing in fresh O2 and the constant pumping of blood, bringing more deoxygeneate blood into the lungs
Most naturally occurring substances are mixtures consisting of pure substances?
Yes, most naturally occurring substances are mixtures of different pure substances. These mixtures can be separated into their pure components using various methods like distillation or filtration. Pure substances are made up of only one type of atom or molecule and have a defined chemical composition.
Are Quartz and coal minerals or only naturally occurring substances?
Quartz and coal are both naturally occurring substances and minerals. Quartz is a mineral composed of silicon and oxygen atoms, while coal is a sedimentary rock made up of organic matter primarily from plant material.
How do cells move through the cell membrane?
Materials move into and out of cells through active transport, diffusion, and osmosis.Active transport occurs when the cell must use energy to actively move the materials up (against) their concentration gradient.Diffusion is passive. This means the cell need not expend energy, the material simply moves from an area of higher concentration to areas of lower concentration. (For example, cook bacon in the kitchen and the smell fills the entire house.)Oxygen and carbon dioxide diffuse across the phospholipid bilayer. Other substances diffuse through proteins embedded in the membrane; this is called facilitated diffusion.Osmosis is the movement of water through a semi-permeable membrane (also called a selectively permeable or differentially permeable membrane), into the solution with the higher solute concentration. This is also a passive process.
How could you prove or disprove that a specific solute such as sucrose was able to diffuse through a semi-permeable membrane?
To prove that sucrose can diffuse through a semi-permeable membrane, you could set up an experiment using a dialysis bag filled with a sucrose solution placed in pure water. If the sucrose molecules diffuse through the membrane, you would observe a change in the concentration of sucrose in the surrounding water over time. To disprove diffusion, you could use a membrane that is impermeable to sucrose, demonstrating that no concentration change occurs in the surrounding solution. Measuring the concentration of sucrose in both compartments before and after a set period would provide clear evidence of diffusion or lack thereof.
How is mineral formed?
Minerals are naturally occurring inorganic substances having a definite chemical make-up and are usually crystalline in structure. They are formed by geological processes.
What are 5 minerals in the crust?
Minerals refer to substances that are naturally formed in the Earth. Examples of minerals that make up the Earth's crust are gold, diamond and quartz.
Will warming up urine dilute it?
No, warming up urine will not dilute it. Dilution occurs when more liquid is added to the urine, decreasing the concentration of substances present. Heating urine does not change its chemical composition.
