An IRB/IEC should have: 1  At least five members. 2  Members with varying backgrounds. 3  At least one member must represent a non-scientific area (a lay member) 4  At least one member must not be affiliated with the institution or the trial site (an independent member)
Vesicles and Vacuoles Vesicles and vacuoles are membrane-bound sacs that function in storage and transport. Vacuoles are somewhat larger than vesicles, and the membrane of a vacuole does not fuse with the membranes of other cellular components. Vesicles can fuse with other membranes within the cell system (Figure 1).
Below the centre of the organism you see the feeding opening. The cilia make a current to sweep in bacteria and other food particles. At the base of the feeding opening the food has been enclosed by a vacuole. Food vacuoles are used to transport the food through the cell.Star-shaped contractile vacuoles or water expelling vesicles are used to balance the amount of water in the cell.Two nuclei bear the genetic information.ood vacuoles and the water expelling vesicles are such organelles. Many ciliates have developed all kinds of very special organelles. Paramecium uses so-called trichocysts: tiny pointed filaments that can be fired at a predator when threatened.