Q1. Capillaries within the brain have tight junctions, whereas capillaries within the anterior pituitary and other endocrine glands contain fenestrations, intercellular clefts, and vescicles for trancytosis. Elucidate how these structural differences are important to the function of the brain and the anterior pituitary.

Q2. Describe the significance of historical achievements in proving the role of microorganisms in human health and disease and maintaining health of the environment. Be sure to explain the current classification of microorganisms.