In cell signalling, after a signal is sent, signal molecules bind to receptors on target cells and some activity in a target cell changes.
There are three stages in cell signalling :
1. The process of reception occurs when a signalling molecule from the extracellular environment is recognized by a cell. The chemical signal, which is also known as a ligand, is recognized as a signal when it attaches to a receptor protein either on the exterior of the cell or on the interior of the cell.
2. Transduction: This process occurs when the signalling molecule interacts with the receptor, which causes a change in the protein that makes up the receptor. The process of transduction is kicked off by this modification. In most cases, signal transduction occurs through a pathway that consists of numerous stages. The signal transduction route contains relay molecules, each of which influences the subsequent molecule in the pathway.
3. Reaction: In the third and last step, the signal causes a certain cellular response.
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Answer:
Newton's first law of motion states that a body continues to be in its state of rest or uniform motion in a straight line unless acted upon by an external force to change that state.
Explanation:
It is also called the law of inertia.
Answer: An object with twice the mass of another object will weigh twice as much is the statement accurately describes the relationship between mass and weight.
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Explanation: A.Mass is an objects weight multiplied by the amount of gravitational force acting upon the object
