Match the description to the appropriate mechanism of transport into/out of cell

Question

Match the description to the appropriate mechanism of transport into/out of cells Oxygen uptake by cells Amino acid movement along a favorable gradient Removal of proteins from the cell Movement of sodium ions into a cell Movement of sodium ions out of a cell Movement of glucose against a concentration A Secondary active transport B. Pinocytosis C Diffusion thru phospholipid bilayer Dxocois E. Diffusion thru phospholipid bilayer or channels . Receptor-mediated endocytosis gradient Movement of water into or out of a cell intake of "solid" objects, such as bacteria Active transport via an ion pump H Diffusion through channels .Phagocytosis J. Facilitated diffusion - Nonselective uptake of extracellular fluid and its solutes Uptake of a ligand (eg. hormone

Explanation / Answer

Answers:

Oxygen uptake by cells- E.Diffusion through Phospholipid bilayer or channels

Reason:Gases like oxygen can diffuse through lipid bilayers or channels easily by simple diffusion

Amino acid movement along the favourable gradient-J.Facilitated Diffusion

Reason: Amino acids and nucleic acids are polar, often charged and too large to use simple diffusion to enter and exit cells. They use facilitated diffusion.

Removal of proteins from the cell-D.Exocytosis

Reason: The movement of macromolecules such as proteins or polysaccharides into or out of the cell is called bulk transport.There are two types of bulk transport, exocytosis and endocytosis, and both require the expenditure of energy (ATP).In exocytosis, proteins are exported out of the cell via secretory vesicles.

Movement of sodium ions into the cells-A. Secondary Active Transport

Reason:When there is a high concentration of sodium ions in the extracellular space, if a route such as a channel or carrier protein is open, sodium ions will move down their concentration gradient and return to the interior of the cell.

Movement of sodium ions out of the cells-G. Active Transport Via Ion pump

Reason: Sodium-potassium pump, moves Na++ ions out of cells using energy in the form of ATP by Primary active transport via ion pump.

Movement of glucose against a concentration gradient-C.Diffusion through Phospholipid Bilayer

Reason:Though ions and polar molecules cannot diffuse across a lipid bilayer, molecules such as glucose are able to cross cell membranes. These molecules pass across membranes by the action of specific transmembrane proteins, which act as transporters. Such transport proteins determine the selective permeability of cell membranes and thus play a critical role in membrane function.

Movement of water into or out of the cell-H.Diffusion through Channels

Reason:The plasma membranes of many cells also contain water channel proteins (aquaporins), through which water molecules are able to cross the membrane much more rapidly than they can diffuse through the phospholipid bilayer.

Intake of solid objects ,such as bacteria-I. Phagocytosis

Reason: Cell eating or phagocytosis intake solid objects by forming vesicles around them

Nonselective uptake of extracellular fluids and its solutes-B.Pinocytosis

Reason: Cell drinking or pinocytosis undergoes nonselective uptake of fluids or solutes

Uptake of a ligand(Eg-a harmone)-F. Receptor Mediated Endocytosis

Reason:Uptake of Ligand takes place by binding to its receptor ,by receptor mediated endocytosis

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