Which of the following describes a drug interaction that directly interferes with the pathway?
Which of the following best describes a drug interaction that directly interferes with a signal transduction pathway? A medication enters the target cell and inhibits an enzyme that normally synthesizes a second messenger.
Which of the following is most likely to reduce the binding of the active ligand to its receptor?
Which of the following most likely to reduce the binding of the active ligand to its receptor? LT# 4Answer:The answer is D. A mutation in the receptor gene that causes a substitution of a charged amino acid for a nonpolar amino acid in the ligand binding site of the receptor.
Which of the following best describes effect of a drug that blocks the production of the mitotic cyclin?
Based on the model of eukaryotic cell cycle regulation shown in the figure, which of the following best describes the effect of a drug that blocks the production of the mitotic cyclin? The cell would be prevented from entering mitosis, and the cell would stop dividing.
Which of the following is the greatest advantage of having multiple steps in a transduction pathway?
The greatest advantage of having multiple steps in a transduction pathway is to provide greater possibility for the amiplification of a paticular signal which is also called signal transduction cascade.
What is the importance of having multiple steps in the signal transduction pathway?
Signal amplification is one benefit of multiple steps. If some of the molecules in a pathway transmit the signal to numerous molecules at the next step in the series, the result can be a large number of activated molecules at the end of the pathway.
What are the 3 steps of a signal transduction pathway?
Cell signaling can be divided into 3 stages.
- Reception: A cell detects a signaling molecule from the outside of the cell.
- Transduction: When the signaling molecule binds the receptor it changes the receptor protein in some way.
- Response: Finally, the signal triggers a specific cellular response.
What are the possible results of a signal transduction pathway?
Connection for AP® Courses. The initiation of a signaling pathway results in a cellular response to changes in the external environment. This response can take many different forms, including protein synthesis, a change in cell metabolism, cell division and growth, or even cell death.
How can we prevent signal transduction pathways?
One method of terminating or stopping a specific signal is to degrade or remove the ligand so that it can no longer access its receptor. One reason that hydrophobic hormones like estrogen and testosterone trigger long-lasting events is because they bind carrier proteins.
What is a signal transduction pathway give an example?
Process by which a signal on a cell’s surface is converted to a specific cellular response in a series of steps. How does a yeast mating serve as an example of a signal transduction pathway? Alpha yeast sends alpha signals that A yeast receives. A yeast sends A signals that only alpha can receive.
What is a signal transduction pathway simple definition?
A set of chemical reactions in a cell that occurs when a molecule, such as a hormone, attaches to a receptor on the cell membrane. The pathway is actually a cascade of biochemical reactions inside the cell that eventually reach the target molecule or reaction.
What is the correct order of a signal transduction pathway quizlet?
What are the four steps of signal transduction? (1) signal molecule binds to receptor that (2) activates a protein that (3) creates second messengers that (4) creates a response.
Which of the following are components of a signal transduction pathway?
The chains of molecules that relay intracellular signals are known as intracellular signal transduction pathways.
- Introduction.
- Binding initiates a signaling pathway.
- Phosphorylation.
- Phosphorylation example: MAPK signaling cascade.
- Second messengers.
- Calcium ions.
Which type of membrane receptor B is represented in the diagram?
Which type of membrane receptor (B) is represented in the diagram? Question 2 Explanation: The correct answer is (B). The diagram shows a ligand-gated ion channel receptor with a region that acts as a gate when the receptor changes shape.
What is the difference between local and long distance signaling?
Local signaling includes Paracrine signaling (A secreting cell acts on nearby target cells by discharging molecules of a local regulator into the extracellular fluid.) Long-distance signaling includes Hormonal signaling (Specialized endocrine cells secrete hormones into body fluids, often the blood.
What is paracrine signaling give an example?
One example of paracrine signaling is the transfer of signals across synapses between nerve cells. A nerve cell consists of a cell body, several short, branched extensions called dendrites that receive stimuli, and a long extension called an axon, which transmits signals to other nerve cells or muscle cells.
What are examples of long distance signaling?
Endocrine signaling is an example of long distance communication between hormone producing cells, tissues and glands and cells that express hormone receptor molecules.
What are the stages of cell signaling?
Three Stages of Cell Signaling First, reception, whereby the signal molecule binds the receptor. Then, signal transduction, which is where the chemical signal results in a series of enzyme activations. Finally, the response, which is the resulting cellular responses.
What signals are used for long distance communication?
The equipment for long distance communication is very important. Communication takes place either through heliograph signaling using a flashing mirror, electrical lamps, spot lights, colored disks, etc., or it is accomplished electrically by radio or by wires within the confined areas of the space station.
What is a hormone How is it an example of long-distance communication?
In long-distance signaling, endocrine cells release hormones into the bloodstream that travel to target cells. In synaptic signaling, neurons release neurotransmitters close to the target cell. Another way the body can transmit signals over distances is with specialized cells.
What happens when a hormone is secreted to the rest of the body?
Once hormones have served their function on their target organs/tissues they are destroyed. They are either destroyed by the liver or the actual tissues of the target organs. They are then removed by the kidneys.
What kind of signals do cells receive?
Conclusion. Cells typically receive signals in chemical form via various signaling molecules. When a signaling molecule joins with an appropriate receptor on a cell surface, this binding triggers a chain of events that not only carries the signal to the cell interior, but amplifies it as well.