what are some examples of diffusion in the human body?
90808
Oxygen diffuses from the lungs into the blood.  Nutrients from the intestines into the blood.  In the kidneys water and various molecules diffuse in all sorts of complicated ways that end up condensing the waste products in the urine and reabsorbing a lot of the water.\n\nIf you want to be really flashy, there are loads of molecules that diffuse through cell membranes and do various things, but you'd have to look these up as I can't think of any good examples off the top of my head.
1042750
Since the oxygen is leaving an area of higher concentration into an area of low concentration (lungs to blood) and the carbon dioxide is doing the reverse the process is called diffusion.
1030647
What you describe is the process of osmosis. Osmosis is actually simple diffusion through a semipermeable membrane. The cell membrane is just such a selective permeable membrane. This allows for the movement of water, and controls what can enter and leave the cell. In fact osmosis is the only way water moves through the body. A good example is sweating, the sweat gland does not pump water the human body cannot do that. Instead it pumps salt and urea to the skin surface, and through the process of osmosis water will follow. Osmosis is going from a high concentration of water to a lower concentration of water (thru the membrane)until equib. is achieved.
31595
Diffusion is transfer of ions or any semipermeable substance through semipermeabe membrane,with help of concentration Gradient across the membrane. Osmosis is loss of water and vapours frm tissue or organised structure like stomata
288380
i assume "respiration" in your context refer to cellular respiration..\n\ncellular respiration in simple terms breaks down glucose and produce energy in forms of adenosine triphosphates.(ATPs). ATPs are the energy currency in the body and the breakdown of ATPs provide the energy needed for other metabolic processes, including digestion. Looking at it another way, digestion of complex nutrients like carbohydrates produces glucose, which is the respiratory substrate..\n\nDiffusion - oxygen required for aerobic respiration enters individual cells by diffusion. Waste products of aerobic respiration such as co2 leave the cells by diffusion into the bloodstream.  in general, diffusion is a passive process which does not require energy from ATPs, be it facilitated diffusion or simple diffusion, both are exergonic processes.\n\nthe circulatory system would carry the materials needed for aerobic respiration, eg oxygen and glucose to the individual cells, oxygen in form of oxyhaemoglobin in red blood cells. The circulatory system also carries the waste products, eg co2 away for excretion. \nThe circulatory system requires the pump, i.e. the heart to work, and the cardiac muscles require ATPs from respiration for contraction.\n\nhope u can see that they are all interrelated now..=)
308322
Lung is a special organ which allows gas exchange. Air passes through trachea, bronchi, bronchioles and finally alveoli. Oxygen will diffuse form the alveoli into the blood plasma whereas the diffusion of carbon dioxide occurs in opposite direction.
1133718
A. Yes, the use of ATP against the gradient is active\nB. This is diffusion or osmosis\nC. Nope\nD. This is passive transport
267869
Exchange of bodily fluids. Example blood and saliva
1155688
A special type of diffussion called osmosis.\n\nOsmosis is the net movement of only WATER molecules from a region of their higher concentration to a region of their lower concetration though a partially/selectively permeable membrane.  (cell membrane)
729616
Could you give a few examples please?
1067028
Try a rough DNA isolation, some things u need are detergent, lemons, and a sample like onion.\n\nSimple diffusion experiments with onions, salt, water, etc..
596473
Diffusion is the spontaneous spreading of something such as particles, heat, or momentum. The phenomenon is readily observed when a drop of colored water is added to clear water, or when smoke from a chimney dissipates into the air. In these cases, diffusion is the result of turbulent fluid motion rather than chemical reactions or the application of external force. In cell biology, diffusion is described as a form of "passive transport", by which substances cross membranes. \n\nOsmosis is the diffusion of a solvent through a semipermeable membrane from a region of low solute concentration to a region of high solute concentration. The semipermeable membrane is permeable to the solvent, but not to the solute, resulting in a chemical potential difference across the membrane which drives the diffusion.
679154
Difference of parameters between two sides of diffusion is diffusion gradient
1034043
there are many kinds of elements and compounds in human body such as blood circulation, repiratory system,muscular system and productive system etc. for an example the function of the blood circulation is to circulate the blood to the whole body . the blood have a pigmen called hemoglobyn to bring along oxygen to the cell in our body. every cell need an oxygen to live. \n\nfurthemore ,our body is contain by many things such as leucosyte , good bacteria , ions , platlet , enzym , hormon , water , uric acid , vitamins, etc. each of this element have their function.
1141484
sanjana,\n                diffusion is natural mixing of particle .if u have reddish brown bromine gas in test tube with another test tube above the gas u will find that the red colouration of bromine gas will soon spread to the test tube on the top.in same way if liquid ink is left in bottom of teat tube full of water it will spread evenly throughout the water.a solid crystal of pottasium manganate if left in water will also naturally spread throughout by diffusion,but its colour spread more slower than gases or liquids.diffusion can only take place if matter is made of particles.if matter had been coninuous there would not have been enough space for liquid and solid to mix together.\ndiffusion take place much more quicker w gases than w liquids or solids.evidence for this is way smells travel.gases r generally lighter than liquids and solids therfore their particles move more quickly.in fact rate of diffusion is inversly related to mass of particle.therefore a dense gas like carbon dioxide with heavy molecules diffuse more slowy than lighter gas hydrogen\ndo u know why i have written\nbecause i am ur neighbour\nfrom pakistan\nif u need my help,plz contact through im or email\nfor web resources\nsearch at google and wikipedia\nali\npakistan
199386
Pupil dilation is a good example.  The pupil constricts, but the muscle that constricts it doesn't "move" any part of the body.
733835
Some diffuse across the membrane.  The membrane is semipermeable  meaning that it allows some things to diffuse accross and some cannot pass at all.  example: Water will diffuse accross.\n\nTheir a various channels in the membrane that will transport items into and out of a cell even against a concentration gradient.\nTheir are calcium and sodium channels.\n\nSome are engulfed by animal cells: example:  white blood cells will engulf bacteria:phagocytossis