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What else can I help you with?
What membrane that allows only some materials to move in and out of the cell is?
Such a membrane is said to be selectively permeable or semi-permeable.
What results would you expect of the experiment started with a glucose and IKI solution inside the bag and only starch and water outside?
The IKI Is small so the pores of in the bag allow it to go throuch but the starch is to big. So based on the size of the molecules, the glucose and IKI would move out of the bag, the water in, and the starch left in the beaker.
Does lactose move across dialysis tubing?
yes, because it is a simple carbohydrate
What makes the cell membrane selective permeable?
A cell membrane is selectively permeable because it only allows particles to move across them due to different concentrations. Molecules move from areas of low concentration to high concentration.
How do particles move through a permeable membrane according to diffusion?
Yes, that is very true, especially with osmosis (the passing of water through a selectively permeable membrane).
Why would the water level increase in the capillary tube during the investigation because of osmosis?
The water level increases in the capillary tube due to osmosis because the concentrated sugar solution in the dialysis tubing creates a lower concentration of water molecules inside the tubing. This lower concentration of water inside the dialysis tubing creates a concentration gradient that drives water to move from the beaker outside the tubing into the tubing through osmosis, causing the water level in the capillary tube to rise.
Why urea passes through the dialysis tubing into the dialysis fluid?
Urea passes through the dialysis tubing into the dialysis fluid due to the process of diffusion, where molecules move from an area of higher concentration to an area of lower concentration. The dialysis tubing is semi-permeable, allowing small molecules like urea to cross while retaining larger molecules and cells. As urea accumulates in the blood and reaches a higher concentration than in the dialysis fluid, it diffuses out to achieve equilibrium. This process helps remove waste products from the blood in dialysis treatments.
What happens to a sugar particle inside a visking tubing and water particles outside?
The sugar particle will diffuse from an area of higher concentration (inside the tubing) to an area of lower concentration (outside the tubing) until equilibrium is reached. Water molecules will also move into the tubing to balance the concentration gradient as the sugar particles diffuse out.
How do you keep cats from chewing plastic oxygen tubing?
You can pick up flexible silicon tubing 5/16" at any hardware store. Get it the same length as the oxygen tubing you want to protect. Ask the store to slit it all the way along its length on one side, so that the O2 tubing can be pushed into the outer tube, which will close up around it. The outer tubing protects the inner tube, and the cat may try to bite it, but will not get through to the inner tube, so the oxygen keeps flowing. The silicon tube is flexible enough to move very much the way the O2 tube would move, and it gives great peace of mind.
Are membranes selectively permeable if they allow only certain substances to move across them?
False.
Why the sugar (honey) could get through the membrane (similar in properties to a cell wall) and the starch could not.?
Sugar, such as honey, consists of small, soluble molecules that can easily pass through semi-permeable membranes, similar to those found in cell walls. In contrast, starch is a large polysaccharide made up of long chains of glucose units, making it too large to diffuse through these membranes. Thus, the membrane allows smaller sugars to move in and out, while restricting the passage of larger starch molecules.
What does it mean if a soil is permeable?
Permeable soil allows water and air to move easily through it. This promotes good drainage and aeration, which are important for plant growth.
