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What type of epithelial tissue propels substances across it surface?
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∙ 8y ago
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What is the barrier around the that lets substances move across it?
cell surface membrane
What best explain the passage of air across alveolar membranes?
diffusion, through moist thin, epithelial cells
How do substances move across cells in active transport?
words
How do larger molecules move across epithelial membranes in the capillaries?
Large molecules are transported across a cell membrane by the process of process of exocytosis. This is when secretory vesicles secretes large molecules by the fusion of vesicles with the plasma membrane.
How do carrier protiens transport substances across cell membrane?
1-A carrier prrotein binds to a molecule on one side of the cell membrane. 2-The carrier protein changes shape,shielding the molecule from the interior membrane. 3-The molecule is released on the other side of the membrane.
What type of epithelial tissue propels substances (e.g. mucus) across surfaces?
Pseudostratified ciliated columnar epithelial tissue propels substances across surfaces.
Tissue that propels substances across its surface?
pseudostratified ciliated columnar
What tissue forms the inner lining of the respiratory passages?
The type of epithelial tissue that lines much of the respiratory tract is called pseudostratified columnar. This type of tissue also moves substances across its surface.
Apical epithelial cell structures functions in the movement of materials across the surface of the cell?
cilia
What is the barrier around the that lets substances move across it?
cell surface membrane
What causes an alkali metal to move over the surface of water while reacting with it?
The densities of lithium, sodium and potassium are less than that of water and so they float on water. They react with water to produce hydrogen gas and this propels the metal across the surface of the water.
Why do cell membranes have convolutions?
To increase surface area, allowing greater contact area for 'transport' of nutrients (movement of substances across the membrane).
How can substances move across capillaries?
Substances typically move across capillaries via diffusion.
What projections allow the cell to move or moves substances along the surface of the cell?
Projections that allow the cell to move or to move substances along the surface of the cell are called cilia and flagella. Flagella is a single long hair that allows the cell to swim. Cilia are several projections used for movement across the cell surface.
Which type of epithelial tissue is used in areas where diffusion is a main function?
Diffusion occurs across simple epithelial tissue. These are only one layer.
How do gases get into and out of the blood?
Via Diffusion across the EPITHELIAL CELL LININGS of the Alveoli.
How do larger molecules move across epithelial membranes in capillaries?
by exocytosis and endocytosis
