1 Connect your iOS device to your computer. 2  Try to import your photos again using your photo-management software. 3  You can also try these steps on your PC: 4  Mac: Open Image Capture in the Applications folder. 5  Windows 8: Move the cursor to the upper-right corner, click the magnifying glass, enter Computer, and press Return.ry to import the photos again. First, try the steps to import the photos to your computer again. Then try these steps: 1  Create a new photo to import. 2  You can save a screenshot on your iOS device by pressing the Home button and the Sleep/Wake button at the same time. 3  Connect your iOS device to your computer.
Cells of the Nervous System. The nervous system is made up of two types of cells: neurons and glia. Neurons are the fundamental cellular unit of the central nervous system (CNS) and peripheral nervous system (PNS). Essential features of neurons:1  The purpose of neurons is to receive, process, and transfer information.2  This information is made up of chemical or electrical signals.ells of the Nervous System. The nervous system is made up of two types of cells: neurons and glia. Neurons are the fundamental cellular unit of the central nervous system (CNS) and peripheral nervous system (PNS). Essential features of neurons:
Schwann cells make myelin in the peripheral nervous system (PNS: nerves) and oligodendrocytes in the central nervous system (CNS: brain and spinal cord). In the PNS, one Schwann cell forms a single myelin sheath (Figure 1A).ntriguingly, in normally unmyelinated fibers, forced expression of neuregulin 1 type III in the postganglionic fibers of sympathetic neurons grown in culture can be forced to myelinate. Thus, the level of neuregulin 1 type III on the PNS axons is a key instructive signal for myelination.