Our perception of the environment depends ona. the properties of the objects in the environment. b.the properties of the electrical signals in the nervous system. c.both the properties of the environmental objects and properties of the electrical signals in the nervous system. d.none of these are true.

The model illustrates a process by which a substance is taken up by a cell. which statements describe the process? a. the model shows the process of endocytosis. b. the process shown in the model requires energy from the cell. c. the cell membrane in the model remains intact throughout the process. d. the model shows the process of facilitated diffusion.