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Diffusion is the movement of molecules (gas, minerals and particles) from an area of higher concentration to an area of lower concentration. Diffusion is an important process that occurs within the cells of plants and animals. One example of diffusion is the exchange of oxygen and carbon dioxide during respiration. When we breathe in oxygen there is a higher concentration of oxygen in our lungs than in our circulating red blood cells, so oxygen diffuses across cell membranes from our lungs into our blood vessels and into our red blood cells to be distributed throughout our body. The reverse happens with carbon dioxide that we exhale. The carbon dioxide is more concentrated in our red blood cells (carbon dioxide is a by-product of cellular respiration - which we will study next) and is diffused into the lungs (lower concentration) and then we exhale releasing carbon dioxide into the environment. This carbon dioxide is taken in by plants to be used in photosynthesis.Another example of diffusion is when nutrients are taken into a plant. Plants utilize nutrients to grow and live and these nutrients are obtained by diffusion. Since nutrients are more concentrated in the soil around the roots, they diffuse into the roots and are carried throughout the plant to the various cells.Materials needed: 1 tube of food coloring (darker colors work best, but any color will do)1 large, clear drinking glass or similar containerWater (from your faucet)Procedure:1. Fill glass container almost to the top with cold water.2. Drop 3-4 drops of food coloring into the water.3. Observe for 2-3 minutes - taking photos to record the progress.4. Record your observations. How do you think diffusion helps nutrients, waste and other molecules move around the cell?
Create a model that would permit the attenuation region to no longer be involved in binding ribosomes and synthesizing leader peptides after the attenuation decision is made.
A patient has blood with a pH of 7.35. Predict the direction of PCO2, for a condition which is consistent with respiratory acidosis. What compensation acts to restore pH to near the value of pH 7.4?
when flavoprotein transfers electrons directly to the final electron acceptor hydrogen peroxide is produced. What other consequences might result from electron carriers in the ETC being bypassed?
What is the possibility that - if they have a daughter - the daughter will be red-green colorblind. How several are born of each genotype.
I'm looked everywhere including my text and I can't seem to figurething one out. If someone can please explain this so I have abetter understanding I would greatly appreciate it.
Suppose a single-basesub stitution occurs in a codon that specifies proline, allamino acids that would replace proline if the mutation was a Transition and Transversion
Two Hfr strains are isolated from a prototrophic coli strain. Both Hfr strains are mated with a Str(r) F- E. coli strain that is mutant for all the genes listed.
During the biosynthesis of a protein, which of the following processes occurs to maintain the fidelity sequence? (A) restoration (B) renovation (C) repair (D) remodeling.
What would the sudden increase in axonal permeability to sodium cause?
In a recent outbreak of disease is associated with both respiratory and gastrointestinal symptoms. You determine that this disease is caused by a virus. How did you do this? How could you determine the most likely portal of entry to the human body..
Compare the spliceosome to the ribosome. What general features do they share in terms of their structure, their components, and their activity? How do they differ?
You will take a culture of photosynthetic bacteria and bubble nitrogen gas through it to displace the dissolved in the solution. Why is it important to keep the bottle covered with foil while you do this?
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