10 Questions
What is the mechanism by which a cell receives, acts on, and alters its behavior in response to a signal from another cell called?
Signal transduction
What are the natural extracellular ligands that bind and activate receptors called?
First messengers
Which of the following is an example of a natural extracellular ligand?
Hormones
When a natural extracellular ligand binds to its specific receptor on the surface of a target cell, it initiates a chain of events. What term is used to refer to these ligands in this context?
First messengers
Which of the following is NOT included in the ligands that are naturally found outside the cells and can bind to specific receptors on the surface of target cells?
Cytosolic enzymes
What is the term used to refer to the mechanism by which a cell receives, acts on, and alters its behavior in response to a signal from another cell?
Signal transduction
Which of the following is an example of a natural extracellular ligand?
Hormones
What are the natural extracellular ligands that bind and activate receptors called?
First messengers
Which of the following is NOT included in the ligands that are naturally found outside the cells and can bind to specific receptors on the surface of target cells?
Enzymes
When a natural extracellular ligand binds to its specific receptor on the surface of a target cell, it initiates a chain of events. What term is used to refer to these ligands in this context?
First messengers
Study Notes
Cell Signaling
- Cell signaling is the process by which a cell receives, acts on, and alters its behavior in response to a signal from another cell.
Ligands and Receptors
- Natural extracellular ligands are molecules that bind and activate receptors on the surface of target cells.
- Hormones, neurotransmitters, and growth factors are examples of natural extracellular ligands.
- When a natural extracellular ligand binds to its specific receptor on the surface of a target cell, it initiates a chain of events.
- These ligands are also referred to as signaling molecules or agonists.
Exclusions
- Vitamins are not included in the ligands that are naturally found outside the cells and can bind to specific receptors on the surface of target cells.
Test your knowledge of inter and intracellular signal transmission with this quiz! Explore the mechanisms by which cells receive, respond to, and modify their behavior in reaction to external signals. Gain a deeper understanding of signal transduction pathways and the role of various ligands such as hormones and neurotransmitters.
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