An analogous formula applies to the case of a continuous probability distribution. Not every probability distribution has a defined mean; see the Cauchy distribution for an example. Moreover, for some distributions the mean is infinite: for example, when the probability of the value is for n = 1, 2, 3, ....
Red blood cell (RBC) production (erythropoiesis) takes place in the bone marrow under the control of the hormone erythropoietin (EPO). Juxtaglomerular cells in the kidney produce EPO in response to decreased O 2 delivery (as in anemia and hypoxia) and increased levels of androgens.
2) the red marrow in bones produces white blood cells which protect against invading microorganisms. movement - bones form joints which provide levers for movement such as walking, lifting, etc. hematopoiesis (blood cell production) - the red marrow produces both red and white blood cells. mineral storage and homeostasis - the skeleton forms a reservoir of minerals, especially calcium, for maintenance of homeostasis. Cells found in bone tissue: osteoprogenitor cells - these are like stem cells for bone