AP BIOLOGY

Detailed explanation-1: -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: -Exocytosis is a form of bulk transport during which large numbers of molecules are transported out of the cell. In exocytosis, a vesicle (a small, membrane-bound compartment) containing the molecules to be released fuses with the cell membrane, and the contents of the vesicle are expelled.

Detailed explanation-3: -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, materials are exported out of the cell via secretory vesicles.

Detailed explanation-4: -Elimination of carbon dioxide and water, which are waste products generated during aerobic respiration. Secretion of antibodies, enzymes and peptide hormones from different cells. Release of neurotransmitters from nerve cells. Recycling of receptors on the cell membrane that intercept signals.

Detailed explanation-5: -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.