Endocytosis and exocytosis are important for how cells talk to each other. They help move things in and out of the cell through the cell membrane.

1. Endocytosis:

   • This is when a cell takes in things, like proteins and nutrients.
   • About half of the signals that help cells communicate come in this way.

2. Exocytosis:

   • This is when a cell sends out things, like neurotransmitters and hormones.
   • Around 30% of what the cell releases is important for sending signals to other cells.

These processes help cells to get the nutrients they need and share messages with each other. They are key for keeping balance in the body and responding to changes in the environment.