Membrane proteins, often containing carbohydrates, are sometimes involved in recognizing what's happening outside the cell and signalling to the inside. Cells need to be connected together for several purposes. Membranes are said to be semi-permeable membranes. Membranes are said to be semi-permeable membranes. In addition to the role of membranes as a barrier, membranes are involved in many other processes.
Membrane fusion has to occur for endocytosis and exocytosis to be effective.
We can use membrane fusion to our advantage by fusing cells together. Know that this technique has been used to study cell membranes and also as a step in making hybridoma cells for making monoclonal antibodies that are very useful tools for research and diagnosis. We will talk about antibodies several times during this course. This figure summarizes many paragraphs of text. Study Fig. 4.3.