What Cell Releases Perforins? Perforin is a cytolytic mediator produced by killer lymphocytes, and is stored in and released by cytoplasmic granules. The proteh is partiall, homologous to the terminal components of the membrane attack complex of complement and produces pores of up to 20 nm in diameter on target membranes. What produces perforin and
Why A Signaling Molecule Can Cause Different Responses In Different Cells? Why can a signaling molecule cause different responses in different cells? The transduction process is unique to each cell type; to respond to a signal, different cells require only a similar membrane receptor. What is the response steps of signaling? Communication by extracellular signals
Why Can A Signaling Molecule Cause Different Responses In Different Cells? Why can a signaling molecule cause different responses in different cells? The transduction process is unique to each cell type; to respond to a signal, different cells require only a similar membrane receptor. How is signal amplification most often achieved? Most cell surface receptors
How Do Hormones Travel To Target Cells? Hormones travel throughout the body, either in the blood stream or in the fluid around cells, looking for target cells. Once hormones find a target cell, they bind with specific protein receptors inside or on the surface of the cell and specifically change the cell’s activities. How are
How Do Hormones Act On Target Cells? Hormones activate target cells by diffusing through the plasma membrane of the target cells (lipid-soluble hormones) to bind a receptor protein within the cytoplasm of the cell, or by binding a specific receptor protein in the cell membrane of the target cell (water-soluble proteins). How do hormones interact
How Do T Cells Kill Infected Cells? Perforin first makes a pore, or hole, in the membrane of the infected cell. Cytotoxins go directly inside the cell through this pore, destroying it and any viruses inside. This is why Killer T-cells are also called Cytotoxic T-cells. The pieces of destroyed cells and viruses are then