Changes with Age. In most cases, a person's normal respiratory rate will change with age; younger adults, children, and babies will typically have faster respiratory rates, because as people age, their breathing usually slows down.
Modic changes are pathological changes in the bones of the spine, the vertebrae. These changes are situated in both the body of the vertebrae and in the end plate of the neighboring disc.
When osmotic pressure changes, osmoreceptors expand and contract in response. When there are low levels of solutes in the blood, these sensory receptors swell, because water moves from the blood into the cells. When the blood has a high concentration of solutes, water moves out of the osmoreceptors and into the blood.