The tutor explains tonicity and osmolarity of blood with saline solution and dextrose. He explains the differences between hyposmotic, hyperosmotic, isosmotic, hypotonic, hypertonic, and isotonic solutions. The tutor also tests the students knowledge to give them a sure understanding of the material. He explains how glucose and dextrose are interchangable. Question: What is tonicity and osmolarity of blood? Examples of how to determine this