It is called ACCOMMODATION. Accommodation refers to the mechanism by which the eye adjusts his optical power in order to focus properly on an object as the distance of the object varies. To achieve this, the shape of the lens has to be adjusted appropriately.
While doing exercise, one can control skeletal muscles only.
The body has three kinds of muscles, that is, skeletal muscle, cardiac muscle, and smooth muscle. The skeletal muscles are linked with the bones of the skeleton, that is why these are under control and are known as voluntary muscles.
On the other hand, the smooth muscles like skeletal muscle can never be under control. These muscles helps in pushing substances, like blood or food through organs. The cardiac muscle is also an involuntary muscle, which is found only in the heart. These muscles helps in contraction of the heart and can never be controlled.
Answer:
a cell membrane is made up of 3 main ingredients, that are-
phospholipids, cholesterol and proteins. cell membrane is consists of lipid bilayer, cholesterols and integral and peripheral proteins. among them, lipid is largest portion that cell membrane has.
so, if a drug needs to be uptaken by the cell in a better manner then it has to couple with lipids.<em> </em>By coupling up with the lipids is the easiest and better way to be uptaken by the desired cell.
