Question

discuss cell surface transport under the following subheading:
(b)regulation of cellular function
(i)nutrient uptake
(ii) excretion of end products
(iii)ionic asymmetry
(iv)receptors
(c)membrane movement
(i) membrane fusion
(ii) absorption and secretion

Answer 1

Cell surface transportation or membrane

transport is defined as the collection of

mechanisms that regulate the passage of

solutes such as ions and small molecules

through biological membranes, which are lipid

bilayers that contain proteins embedded in the

layers between them. The movement of the

substance is via the transportation proteins

which helps in the transportation of the

substance in the layers of the cells.