0
They are there to increase the surface area of the small intestine.
Simply put, it allows absorption of nutrients and other food molecules to be carried out more efficiently than when there are no microvilli. Think of a single microvilli as a fisherman. It would not be wrong to say that the more fishermen there are, the more fish they'll catch, right? Also, please bear in mind that nutrients, etc. have been chemically broken down from their original structure, so it is likely that the molecules are spaced out, taking into account the effect of the body's temperature on the molecules. We may assume from here that the bonds of the chyme (digested food) keeping the nutrients together have been weakened or broken. The small intestine is approximately 1.5cm in diameter, so you can imagine that the cellulose/plant material or any other undigestable food being in the center of the small intestine and surrounded by nutrients and the like. (Picture description because I don't have one: Rectangle in a bigger rectangle. The first rectangle is the undigested food which we will surround with negative charges just to represent nutrients and other food molecules only! The second rectangle is the small intestine which will have spikes or folds on the inside of the rectangle which are the villi. Once you have imagined this, you should realize that when food is pushed through the small intestine, the folds/villi brush against it and pick up our charges on the outside of the food). If you find any contradicting information to what I have just said please tell me so I may edit this or remove it in the future.
Add your answer:
Earn +20 pts
Which parts of the renal tubule is formed by cuboidal epithelial cells bordered by dense microvilli?
Proximal Convoluted Tubule
In which segment of the nephron would you find cuboidal cells with many microvilli and mitochondria?
The Proximal Convoluted Tubule
How are proximal convoluted tubule cells similar to enterocytes of the small intestine?
Both proximal convoluted tubule cells and enterocytes are involved in the absorption of substances: the proximal convoluted tubule cells reabsorb substances from the filtrate in the kidney, while enterocytes absorb nutrients from the food in the small intestine. Both cell types have microvilli to increase their surface area for absorption and are polarized to facilitate the transport of substances across their membranes.
What are the similarities between the distal tubule and the proximal tubule?
Both the distal tubule and proximal tubule are parts of the renal tubule in the nephron. They are involved in reabsorption of essential substances such as water, electrolytes, and glucose from the filtrate. They both play a crucial role in regulating the body's fluid and electrolyte balance.
What are occurs in the proximal tubule?
The regulation of pH of the filtrate is what occurs in the proximal tubule. The regulation occurs by exchanging hydrogen ions for bicarbonate ions. The proximal tubule is part of the duct system of the kidney.
Which parts of the renal tubule is formed by cuboidal epithelial cells bordered by dense microvilli?
Proximal Convoluted Tubule
Is it true that lumen surfaces of the tubule cells within the proximal convoluted tubule ae covered with microvilli?
yes, it's true
In which segment of the nephron would you find cuboidal cells with many microvilli and mitochondria?
The Proximal Convoluted Tubule
Tissue lining the proximal convoluted tubule?
The tissue lining the proximal convoluted tubule in the kidney is composed of a single layer of simple cuboidal epithelial cells with microvilli on their apical surface. These cells are responsible for reabsorbing substances such as glucose, amino acids, and ions from the filtrate back into the bloodstream. The microvilli increase the surface area available for absorption.
What histological feature distinguishes proximal convoluted tubule from a distal convoluted tubule?
Proximal convoluted tubules have brush borders or microvilli on the inner edge of the tubule. Distal convoluted tubules do not have this structure.
What structural modification of certain tubule cells enhances their ability to reabsorb substances from the filtrate?
Increasing the surface area of the plasma membrane through the presence of microvilli enhances the reabsorption capacity of certain tubule cells. These microvilli increase the area available for transport proteins to facilitate the reabsorption of substances from the filtrate, such as in the proximal convoluted tubule of the nephron.
How are proximal convoluted tubule cells similar to enterocytes of the small intestine?
Both proximal convoluted tubule cells and enterocytes are involved in the absorption of substances: the proximal convoluted tubule cells reabsorb substances from the filtrate in the kidney, while enterocytes absorb nutrients from the food in the small intestine. Both cell types have microvilli to increase their surface area for absorption and are polarized to facilitate the transport of substances across their membranes.
The portion of the nephron closest to the renal corpuscle is the?
proximal convoluted tubule.
ARE THE lumen surfaces of the tubule cells within the proximal convoluted tubule are covered with micro villi?
yes
What substance is secreted by the proximal-tubule cells and prevents the pH of urine from becoming too acidic?
Bicarbonate is secreted by the proximal-tubule cells to prevent urine pH from becoming too acidic.
What type of cells form the proximal convoluted tubules?
Simple Cuboidal with Microvilli
What is the last portion of the renal tubule?
the three main portions of the renal tubule are the proximal convoluted tubule, the loop of henle, and the distal convoluted tubule. the proximal convoluted tubule is the first portion. The proximal (convulated) tubule.
