For immune function, the following doses have been taken by mouth: 40 IU of vitamin D3 daily for 20 years to 100,000 IU of vitamin D3 bimonthly for 12 months, or 10,000 IU daily. For inflammatory bowel disease, 0.5 micrograms of alfacalcidol has been taken by mouth daily.
Intersecting lines. Two or more lines that meet at a point are called intersecting lines. That point would be on each of these lines. In Figure 1, lines l and m intersect at Q. Figure 1 Intersecting lines. Perpendicular lines. Two lines that intersect and form right angles are called perpendicular lines.
Isometric Lines: The lines parallel to the isometric axes are termed isometric lines. The lines CD, CB etc are examples of isometric lines. Non-isometric Lines: The lines which are not parallel to isometric axes are termed non-isometric lines. The BD is an example.