Meninges refers to the three layes of membranes surrounding the brain and spinal cord of the mammals. The inflammation of these protective membranes of the brain and the spinal cord caused by the infection of bacteria, virus or other microorganisms is called the meningitis.
A laboratory test to identify or rule out meningitis is the analysis if the cerebrospinal fluid (CSF) by lumbar puncture. CSF is a colorless fluid filling the ventricles of the brain and the central canal of the spinal cord. Lumbar puncture is a techinque of isolating the CSF from the sac sround the spinal cord using a needle under a local anesthetic. The sample is then analysed for the opening pressure which is normally between 6 and 18 cm of water in a patient who is not infected with meningitis. Also, the levels of glucose in CSF is above 40% of that in blood in non-infected persons. If lactate levels are less than 35mg/dl, this will also rule out meningitis. 
 
        
             
        
        
        
Answer: b 
Explanation: i got the answer wrong and i’m looking at the results rn 
 
        
             
        
        
        
Answer:
Dessert and tundra 
Explanation:
Theses two biomes get very little rain and because of this they have a less diversity of fauna and flora. 
The differences are that a tundra is very dry and extremely cold and on the other hand a desert is very arid and hot and it can go as high as 54°C (130°F). 
 
        
             
        
        
        
Answer:
Enzymes are involved in the formation and composition of every cell in the body. Thus they also control the working of every organ and even the brain - the control center. They are involved in the breakdown, absorption, distribution and circulation of various nutrients entering the body.
Explanation: