A pharmacology student asks the instructor what an accurate description of a drug agonist is. What is the instructor's best resp
onse? A) A drug that reacts with a receptor site on a cell preventing a reaction with another chemical on a different receptor site
B) A drug that interferes with the enzyme systems that act as catalyst for different chemical reactions
C) A drug that interacts directly with receptor sites to cause the same activity that a natural chemical would cause at that site
D) A drug that reacts with receptor sites to block normal stimulation, producing no effect
A drug that interacts directly with receptor sites to cause the same activity that a natural chemical would cause at that site is the instructors best response.
Explanation:
Receptors are Macromolecules which involved in chemical signalling within cells. It is possible that receptors are located in the cell surface membrane. Cellular biochemical process is regulated by Activated receptor. The drugs are capable to affect to receptor who is related to the drug’s affinity and also intrinsic efficacy.
The affinity and activity of drug is related to its chemical structure. its effect is decided by the time duration where complex persistence of drug-receptor.
The dead matter from organisms such as plants and animals that die need to be recycled so the nutrients in the matter are released and used up by other organisms. This is how sustainability is achieved in ecosystems through a cyclical nature of nutrients flow. Decomposition of the dead matter is done by decomposers such as fungi and bacteria. Without them, the dead matter would accumulate while the soil would lack nutrients for plants to grow and for other bacteria to utilize for energy. This would affect the rest of the food chain/web causing the ecosystem to collapse.
