Answer:
C) a living single-celled organism such as phytoplankton
Answer:
The correct answer will be- true.
Explanation:
Stress is a psychological condition in which the person feels the physical tension marked by the frustration, nervousness and angry behavior.
The studies have shown that stress has caused many serious health problems as it leads to the production of the cortisol which lowers the immunity of the body.
The health problems caused by the stress include high blood pressure, heart attacks, obesity, gastrointestinal problems, depression, diabetes, asthma and many others.
Thus, stress leads to disease is true.
The carrier proteins through which sugar enters pancreatic beta cells have "Higher Km" (a high Km indicates low affinity for the substrate) than the carriers through which sugar enters muscle cells at fasting blood sugar levels.
In order for muscle cells to increase sugar import Insulin "must be present". Oh, and glucokinase has a High Km (a lower affinity for glucose ) when compared to hexokinase.
"Proton pumps" are responsible for the release of transferrin from the transferrin receptor and iron form transferrin (Proton pumps are transporters that move hydrogen ions from regions with low concentration to regions with higher concentration)
"Iron Reductases" convert the iron to the active form in which it may be exported (ferric iron is converted to ferrous iron by ferric reductase). This happens in the "Lysosome" (lysosome is an organelle that contains hydrolytic enzymes)
The system is open.
An open system is one where mass is able to flow in and out of the system. The mass entering this system is the water that is added to the fish tank, and the leaving mass is the waste that is generated.
The primary advantage of using this system is that the quality of the water supplied to the fish may be maintained, meaning the fish are healthy and do not have to live in waste, as they would have to if the system was closed.