What is diffusion? Give some examples of when it is used. Explain the Brownian movement and how it influences molecules moving in solution. How does temperature affect biological processes? What processes are affected? Explain what exchange diffusion means, and give an example. ...
P. 1984. How molecules get to their detectors: the physics of diffusion of insect pheromones. Trends in Neuroscience 94: 116-119.Futrelle, R.P. (1984) How molecules get to their detectors: the physics of diffusion of insect pheromones, TINS, April: 116–120....
Changing the parameters of the system, such as how quickly the morphogens are generated or travel, or the size and shape of the space in which they move, can alter the final pattern. For example, a cheetah’s tail is long and skinny; in that narrow space, the spots coalesce into stripe...
How does the larynx function in respiration? What destroys cilia and alveoli? How does the structure of alveoli relate to their function? Why do molecules move? How are signaling pathways used in organisms? How can molecular movement bring about diffusion?
And because the one side of the arm is crowded with sugar, pure water from the other side decides to move on over to make the concentration more equal or until the osmotic pressure (the pressure that happens as the molecules move) is reached [source: Encyclopedia Brittanica]. So there you...
1)Across cell membranes, oxygen and carbon dioxide move or transport via simple diffusion, and no...
This method is commonly done in clear class containers, so there’s the added benefit of being able to see root growth to monitor progress. How do you grow semi-hydroponically? Of course, in this short article we won’t be able to cover every detail, so if this is something you’re...
Very low tunneling currents (<1 pA) are required for stable imaging as the molecules otherwise move during scanning. To induce this motion in a controlled fashion we applied a voltage pulse of 1.3 V at the location indicated in Fig. 2a. A sudden increase in the tunneling current (Fig....
Why can hydrophobic molecules cross the cell membrane? How do phospholipids interact with water molecules? How does facilitated diffusion enable molecules to cross cell membranes? Why can nonpolar molecules pass through the cell membrane? Describe how the phospholipids are arranged in the cell membrane...
How do water molecules move through the cell membrane during osmosis? How does facilitated diffusion enable molecules to cross cell membranes? What is the means of transport for large molecules and ions? Explain how the exchange of materials across the cell membrane. ...