Essays Tagged: "Passive transport"
Biology Basics: Homeostasis
tances spread from regions of high concentration to regions of low concentration. It is a method of passive transport, and thus costs the cell no energy. Electrically charged ions and large molecules ... tion of the concentration gradient, and does not expand any energy.Ion Channels are another form of passive transport. They allow passage of important ions, some are always open, some have gates. Also ...
Subjects: Science Essays > Biology
Osmosis investigation
e environment surrounding the cell.There are two ways that the molecules move through the membrane: passive transport and active transport. Active transport requires that the cell use energy that it h ... at it has obtained from food to move the molecules (or larger particles) through the cell membrane. Passive transport does not require such an energy expenditure, and occurs spontaneously.The principl ...
Subjects: Science Essays > Biology
Osmosis
pressure of the cell decreases(plasmolysis) and cell shrivels- plasmolysis causes plants to wilt2. PASSIVE TRANSPORT - requires no energy and allows polar molecules and lipids to cross the membrane- ...
Subjects: Science Essays > Environmental Science
Study guide chapter 8 for AP Bio (Biology by Campbell and Reece)
on is a spontaneous process because it decreases free energy8. Diffusion across the membrane causes passive transport. This is because the cell doesn't have to use energy for this process.9. The conce ...
Subjects: Science Essays > Biology
Notes on Membrane Structure and Function
is the tendency for molecules of any substance to spread out into the available space*Diffusion is passive transport with or down the gradient*Diffusion decreases free energy; increases entropy*Passi ... have to expend energy for the diffusion of a substance across a biological membrane*Osmosis is the passive transport of water*A higher solute concentration is hypertonic*A lower solute concentration ...
Subjects: Science Essays > Biology
Cell Membrane
alty or sugary foods seldom grow bacteria.Osmosis and diffusion allow things to enter cells through passive transport. Passive transport means that the cell does not have to use energy to move these s ... s not have to use energy to move these substances into or out of the cell. There is another kind of passive transport called facilitated diffusion. In facilitated diffusion, proteins in the cell membr ...
Subjects: Science Essays > Biology
Biology - The Movement of Molecules
reely. The structure of the membrane allows materials to move across it by 2 main means: active and passive transport. Password transport involves two processes: Diffusion and Osmosis. Passive transpo ... own the concentration gradient by "carrier proteins" in the cell membrane.Osmosis is also a type of passive transport involving the diffusion of water molecules across a selectively permeable membrane ...
Subjects: Science Essays > Biology
How do different sugar solutions effect osmosis in a potato chip?
Osmosis is a type of passive transport. This means that it is a process that does not need any energy to take place.Parti ... es pass through and come out on the other side of the membrane.DiffusionDiffusion is also a type of passive transport so this also doesn't require any energy to take place. Diffusion is the spreading ... nsp.htmlFacilitated Osmosishttp://www.bbc.co.uk/education/asguru/biology/01cellbiology/05pathways/07passivefacilitated/index.shtmlhttp://www.sirinet.net/~jgjohnso/actpastransp.htmlDiffusionhttp://www. ...
Subjects: Science Essays > Biology
Why are cells microscopic?
proteins. This figure shows ions moving in an ion channel. Ion channels can only allow ions to move passively, without the addition of energy. They are essentially water-filled pores, and ions pass th ...
Subjects: Science Essays > Chemistry
Bio 207 notes "animal physiology"
electronuetrol cotransporterthe movement of chloride atom into the ambient water is electrogenetic passive transportsodium move directly from the blood into the ambient water by passive transport bec ... eir ion the most from active transport than getting it from food , and it also lose ion mostly from passive diffusion not from urineFresh water crabs and toad fish is very hyperisomatic than fresh wat ...
Subjects: Science Essays > Biology > Human Biology
Animal physiology study notes
the mostly from active transport rather getting it from food , and it also lose its ion mostly from passive diffusion into waterFresh water crabs and toad fish is very hyperisomatic to fresh water, so ...
Subjects: Science Essays > Biology
Biology Notes
development, and cells that form sperm•Transport of substances across the membraneo Active and Passive Transport are both selectively permeableoPassive Transport1.Diffusion: The random movement o ...
Subjects: Science Essays > Biology