Final answer:
True, exocytosis in plant cells is responsible for secreting hormones, neurotransmitters, and digestive enzymes. This process involves the fusion of vesicles with the plasma membrane to release substances outside the cell.
Step-by-step explanation:
The statement that in plant cells, exocytosis provides a mechanism for secreting hormones, neurotransmitters, and digestive enzymes through the plasma membrane is true. Exocytosis is a cellular process where secretory vesicles transport materials to the plasma membrane, fusing with it and releasing their contents to the cell's exterior. This process is essential for various functions, including the secretion of digestive enzymes by cells of the stomach and pancreas, the secretion of hormones by endocrine cells, and the release of neurotransmitters at synapses between neurons. Additionally, immune cells may use exocytosis to secrete histamine, which is crucial for immune responses.