Chemical and physiological buffer systems - Compare and contrast the chemical and physiological buffer systems. Why are there two systems? How do they work in conjunction to maintain homeostasis? Be detailed.

Kidney Filtration - Describe the three pressures involved in the process of filtration. Give a brief description of what would occur if a kidney stone was present. Which of the three pressures would increase? How would this effect filtration? Please do not copy and paste from a website. Be detailed.

Diarrhea - While visiting a foreign country, you inadvertently drink the water, even though you have been advised not to. You contact an intestinal disease that causes severe diarrhea. How would you expect your condition to affect your blood pH, urine pH and pattern of ventilation?

The kidney and blood loss - You have just been in an accident and experienced substantial blood loss. What autoregulatory mechanisms in the kidney will be initiated to maintain filtration pressure? If blood loss occurs, what further mechansims are used to maintain pressure? Please be detailed and do not copy and paste from a website.

Neurons - Hi-Please explain...A neuron with several hundred axon terminals synapsing on it and the majority are firing. The neuron in question though is not transmitting an impulse-why and when would this occur?