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Same as anywhere else on the cell.
The function of the villi is to increase the surface area, and thus the rate of diffusion.
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∙ 8y ago
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Does the number of villi on a cell affect the diffusion rate?
si....
What is the function of micro villi in the kidney?
To increase the surface area of the tubule. It creates a larger surface area for re-absorption to occur, and thus more diffusion can occur at once.
What are the three types of villi?
The three types of villi are: Intestinal villi-microscopic finger like projections on the inner surface of the ileum. Chorionic villi-villi on the outermost membrane of the foetus. Arachnoid villi-villi on the arachnoid membrane of the brain.
Are finger like projections of the mucosa?
Villi. Most absorbtion occurs in the ileum btw.
What drains cerebrospinal fluid in to venous blood in the dural sinus?
The Cerebrospinal Fluid is absorbed into the venous blood in the dural sinuses through the arachnoid villi. Arachnoid villi connect the subarachnoid space to the superior sagittal sinus.
Does the number of villi on a cell affect the diffusion rate?
si....
How the villi help in digestion?
Villi absorb nutrients in the remaining food through diffusion. The villi are shaped in microscopic hair-like waves so that they have greater surface area, therefore enhancing the diffusion process.
What 2 features of a villi help the small intestine function?
Large surface area Thin- Short distance for diffusion
What are the similarities and differences between villi and alveoli?
Villi are in the small intestine and alveoli are in the lungs. They both work by diffusion.
What organ contains structures called villi?
Villi (singular villus) are finger-like structures that are found on the inner wall of small intestines. Villi function to absorb glucose, amino acids and water soluble vitamins by diffusion into the blood capillaries in the villi.
What are villi microvilli and lacteals?
In the ileum, (3rd part of small intestine after the 1st, duodenum, then the 2nd, jejunum) is where the villi and microvilli are. The villi are folds of the illeum wall, and their purpose is to increase the surface area. They are finger-like projections. These folds, or finger-like projections, have further projections on their surface. So in other words the villi have villi on them. But they are called microvilli. They are also to further increase surface area. The villi and microvilli are there for absorption. This is where most of the absorption of the nutrients from digestion occur(a fraction in the stomach wall).These nutrients are absorbed by diffusion into a capillary in the villi. Except for the fatty acids, which are absorbed by the lacteal in the villi. The villi are very thin. This allows diffusion to occur easier as it is close to the surface. The capillary and lacteal are close to the surface for the same reason. The villi are also semi-permeable, allowing only certain molecules to diffuse, and not diffuse the other way round. The nutrients, absorbed by the capillary in the villi, are now in the blood stream where they can be used as energy and proteins are sent to the liver to be broken down into amino acids to be arranged into the protein again that the body wants. Eventually some nutrients become part of your tissue (assimilation)I hope this somewhat helps. :)but hey, im 16, what do I know. you may want to check I'm right. :)
What adaptation does the small intestine have to help diffusion?
Diffusion is needed in the small intestine so that nutrients from digested food can be diffusedinto the blood vessels of the intestine wall. The lining of this wall is called the mucosa and is covere in tiny wrinkles that form indents in the surface. Not only does this increase surafce area but there are tiny hairs called villi as well that add even more surface area. The villi are also covere in microvilli. Rhis means more surface for nutrient absorption. Furthurmore these villi are only one cell thick meaning substances cam easily be exchanged to and from the blood vessels.
What are the adaptations of the small intestine?
In this case, I am assuming that you are asking for the diffusion of digested food substances, namely fats, sugars (glucose)and amino acids. Firstly, the surface area of the small intestine is increased: 1. the inner walls of the small intestines have numerous folds 2. the inner walls of the small intestine are also lined up with numerous minute finger-like projections called villi. These villi further increase the surface area for absorption. 3. The epithelial cells of the villi, in turn, have numerous microvilli to further increase the surface area Secondly, the small intestine is super long, about seven metres in an adult. This provides sufficient time for the absorption of digested food substances. Thirdly, the aforementioned villi have thin walls or membranes (epithelium is only one cell thick) Fourthly, the intestinal wall and the villi have many capillaries to carry away the absorbed food substances. In each villus is a lacteal or lymphatic capillary surrounded by blood capillaries. The lymphatic capillaries of the villi transport fats while the blood capillaries transport amino acids and sugars away from the intestine. Glucose and amino acids are thus absorbed by diffusion into the blood capillaries of the villi. Do note that the rate of diffusion is affected by the speed of blood flow. Slower blood flow will impair diffusion due to gentler concentration gradient. Hope this helps. The information provided is from a Biology Textbook published from Marshall Cavendish Education, Singapore.
What is the function of micro villi in the kidney?
To increase the surface area of the tubule. It creates a larger surface area for re-absorption to occur, and thus more diffusion can occur at once.
What structure enables the small intestine to absorb large amounts of nutrients?
villi
What are the three types of villi?
The three types of villi are: Intestinal villi-microscopic finger like projections on the inner surface of the ileum. Chorionic villi-villi on the outermost membrane of the foetus. Arachnoid villi-villi on the arachnoid membrane of the brain.
What is a easy definition for micro villi?
A micro villi is a micro villi
