Mechanical stress applied to bone increases osteoblast activity in bone tissue, and the removal of mechanical stress decreases osteoblast activity.
Explanation:
Osteoblasts are cells , that are produced in the bone marrow and are responsible for formation of bones and bone matrix.
Whenever a mechanical stress is applied on the bones , a series of reactions are triggered. As a result the activities of osteoblast increases to synthesize more and more bone matrix to provide strength.
Again on the other hand a decrease in mechanical causes a decrease in the activities of the osteoblasts.
Whittaker's classification scheme recognizes five kingdoms<span>: Monera, Protista, Fungi, Plantae, and Animalia. Based on RNA studies </span>Carl Woese divided<span> the prokaryotes (</span>Kingdom<span> Monera) into two </span>kingdoms<span>, called Eubacteria and Archaebacteria.</span>
lactobacillus is responsible for producing lactic scid. It is broken down in two groups, hermofermentative species and hetorfermentative species.
Cell membrane fluidity is determined by many things, including the presence of or absence of saturated and or unsaturated fatty acid tails, and because of that the ability of the phospholipids in a cell membrane to tightly pack together or not. I believe though in terms of an additional substance it would have to be cholesterol. These specific lipid molecules are inserted in between the phospholipids preventing phospholipids from tightly packing together thus allowing the cell membrane to have greater fluidity and flexibility.
