AP BIOLOGY

Detailed explanation-1: -Vesicles or other bodies in the cytoplasm move macromolecules or large particles across the plasma membrane. There are two types of vesicle transport, endocytosis and exocytosis (illustrated in Figure below). Both processes are active transport processes, requiring energy.

Detailed explanation-2: -Endocytosis and exocytosis are the bulk transport mechanisms used in eukaryotes. As these transport processes require energy, they are known as active transport processes.

Detailed explanation-3: -The process of exocytosis involves vesicles fusing with plasma membranes and releasing their contents. Endocytosis and exocytosis are both active transport processes.

Detailed explanation-4: -Both endocytosis and exocytosis need energy in the form of adenosine triphosphate or ATP, used in the movement of the substances in and out of the cell. There are three types of endocytosis-phagocytosis, pinocytosis and receptor-mediated endocytosis.

Detailed explanation-5: -Endocytosis (endo = internal, cytosis = transport mechanism) is a general term for the various types of active transport that move particles into a cell by enclosing them in a vesicle made out of plasma membrane.