(c) An active transport process in which molecules or ions of a sub-
stance move from a region of higher concentration to a region of
lower concentration with the assistance of an integral protein
(d) A passive transport process in which molecules or ions of a sub-
stance move from a region of higher concentration to a region of
lower concentration with the assistance of an integral protein- Active transport is
(a) the movement of a substance across the cytoplasmic membrane in
the direction of the gradient by using energy provided by the cell
(b) the formation of pores (called channels) in the cytoplasmic mem-
brane that permit the flow of molecules through the cytoplasmic
membrane
(c) the movement of a substance across the cytoplasmic membrane
against the gradient by using energy provided by the cell
(d) is a process in which molecules or ions of a substance move from a
region of higher concentration to a region of lower concentration
with the assistance of an integral protein - What are the two types of endocytosis?
(a) Facilitated diffusion and passive transport
(b) Phagocytosis and pinocytosis
(c) Hydrolysis and cytosol
(d) Nucleoid and cytosol
CHAPTER 4 Prokaryotic and Eukaryotic Cells^85