1) a) A patient displays the enlargement of lateral and third ventricles, however no enlargement of fourth ventricle. Explain what do you conclude?

b) At the time of a spinal tap of the patient, blood is discovered within the CSF. What does this finding proposed?

2) Describe the difference of hypotonic and hypertonic concentration in the sucrose and the NaCl solutions. 

Explain why is 5% (w/v) Sucrose solution hypotonic to the water plant cell, however a 5% (w/v) NaCI solution is hypertonic? Specify whether the tonicity should be same?