At a fundamental level, water provides electrons to replace those removed from chlorophyll in photosystem II. Also, water produces oxygen as well as reduces NADP to NADPH (required in the Calvin cycle) by liberating H+ ions
During the process of photosynthesis, six molecules of carbon dioxide and six molecules of water react in the presence of sunlight to form one glucose molecule and six molecules of oxygen. The role of water is to release oxygen (O) from the water molecule into the atmosphere in the form of oxygen gas (O2).
Water also has another important role of being an electron feeder. In the process of photosynthesis, water provides the electron that binds the hydrogen atom (of a water molecule) to the carbon (of carbon dioxide) to give sugar (glucose).
Water acts as a reducing agent by providing H+ ions that convert NADP to NADPH. Since NADPH is an important reducing agent present in chloroplasts, its production results in a deficit of electrons, resulting from oxidation of chlorophyll. This loss of electron must be fulfilled by electrons from some other reducing agent. Photosystem II involves the first few steps of the Z-scheme (the diagram of the electron transport chain in photosynthesis) and therefore a reducing agent that can donate electrons is required to oxidize chlorophyll, which is provided by water (acting as a source of electrons in green plants and cynobacteria). Hydrogen ions thus released create a chemical potential (chemiosmotic) across the membrane that finally results in synthesis of ATP. Photosystem II is the primary known enzyme that acts as catalyst in this oxidation of water.
Tourism
Explanation:
Tourism made a lot of money in the industry ages.
The following statement made by the student indicated a need for further education:
"Ketamine is the anesthetic typically used for children who have suffered head trauma and need to be intubated."
<u>Explanation</u>:
A nursing instructor is a nurse who guides the licensed practical nurses and gives knowledge to them regarding their practices.
In such situation, a student says that Ketamine should be used for child suffering from head trauma. This indicates lack of knowledge about the drug. Actually Ketamine increases the intracranial pressure and it should not be used in children suffering from head trauma.
Succinylcholine can be used for the child who is suffering from head trauma and need to be intubated. Atropine can be used to reduce the risk of bradycardia.
Answer:
The answer is generalised anxiety disorder.
Explanation:
Generalised anxiety disorder (GAD) is a condition characterised by constant and often exaggerated worry about different situations. Usually, people who suffer from this disorder ignore the reason they feel afraid or distressed.
Common symtpoms of this disorder are increased heart rate, sweating, sleep problems and trembling. These might intefere with a person's daily routine. For example, a person might feel too anxious to take the bus for work. GAD can be treated with therapy and medication such as antidepressants.
