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What is the explanation for the fact that most cells are small and have cell membranes with many convolutions?
Wiki User
∙ 9y ago
Small cells are better able to transport material more efficiently. Many convolutions increase the surface area of the cell, thus allowing for more interactions between the cell and its environment. A large cell has greater volume to its surface area and if this is too large, it will not get enough protein and oxygen.
Wiki User
∙ 9y ago
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What are small channels that form across the plasma membranes of adjacent cells?
plasmodesmata
How does cytokinesis in animal cells differ from cyoknesis in plant cells?
In animal cells cytokinesis occurs when a cleavage furrow(a groove in the cell surface) forms around the cell. This furrow narrows the cell across the centre and eventually pinches it into two new cells.In plant cells a cleavage furrow does not form. Instead a cell plate forms across the equator of the cell. The cell plate consists of small vesicles which fuse to form two membranes across the cell. The new membranes fuse with the existing cell membranes and a new cell wall forms between them.
Plasma membranes that have been isolated from red blood cell are not contaminted by internal cell membane?
Plasma membranes isolated from a red blood cell will not be contaminated with internal cell membrane (i.e. membrane from cell organelles - small structures found within cells) because red blood cells do not contain any organelles, so there will be no 'internal membrane' to contaminate.
What digestive enzymes are located in the plasma membranes of cells in the lining of the small intestine?
The plasma membranes of cells in the lining of the small intestine contain brush border enzymes, which are responsible for the final breakdown of carbohydrates, proteins, and fats. Some examples of these digestive enzymes include maltase, sucrase, lactase (to break down carbohydrates), peptidase (to break down proteins), and lipase (to break down fats).
How does the structure of the membrane speed up or help speed up certain molecule transport without the use of energy?
Fluid membranes such as cellular membranes allow the passage of small and neutrally charged atoms and molecules, such as oxygen. In cells there are also carrier proteins that do not require ATP to transport larger molecules such as water.
Why are small cells better then large cells for moving materials through membranes?
small cells have a greater surface-to-volume ratio than larger cells.
What are small channels that form across the plasma membranes of adjacent cells?
plasmodesmata
Thyroxine molecules are too large to pass through the plasma membranes of their target cells?
false- small
What organelles inside the cell have membranes with many convolutions?
Cell membranes have many convolutions because they increasee the surface area to volume ratio, thus increasing the diffusion rate.
How does the vacoule look?
A vacuole usually looks like a liquid or gel filled, transparent membranes. They look a little like bubbles. They are small and scattered in animal cells while in plant cells they are big and prominent but are small in number and located at the centre.
How does cytokinesis in animal cells differ from cyoknesis in plant cells?
In animal cells cytokinesis occurs when a cleavage furrow(a groove in the cell surface) forms around the cell. This furrow narrows the cell across the centre and eventually pinches it into two new cells.In plant cells a cleavage furrow does not form. Instead a cell plate forms across the equator of the cell. The cell plate consists of small vesicles which fuse to form two membranes across the cell. The new membranes fuse with the existing cell membranes and a new cell wall forms between them.
Plasma membranes that have been isolated from red blood cell are not contaminted by internal cell membane?
Plasma membranes isolated from a red blood cell will not be contaminated with internal cell membrane (i.e. membrane from cell organelles - small structures found within cells) because red blood cells do not contain any organelles, so there will be no 'internal membrane' to contaminate.
What digestive enzymes are located in the plasma membranes of cells in the lining of the small intestine?
The plasma membranes of cells in the lining of the small intestine contain brush border enzymes, which are responsible for the final breakdown of carbohydrates, proteins, and fats. Some examples of these digestive enzymes include maltase, sucrase, lactase (to break down carbohydrates), peptidase (to break down proteins), and lipase (to break down fats).
How does the structure of the membrane speed up or help speed up certain molecule transport without the use of energy?
Fluid membranes such as cellular membranes allow the passage of small and neutrally charged atoms and molecules, such as oxygen. In cells there are also carrier proteins that do not require ATP to transport larger molecules such as water.
What is small in animal cells but large in plant cells?
Animal cells have small vacuoles, whereas plant cells have large vacuoles.
What do you now have to do to successfully use your cloned gene to transform mice?
To transform the mice, you can: 1. inject the gene into the cells with microscopically small needles 2. use electroporation (an electical pulse that creates temporary pores in the plasma membranes of the cells that DNA can go through) 3. use a powerful virus
What is the Membrane that connects parts of the small intestines?
The membranes that are attached to the small intestine are called the messentaries.
