The example of a biotic factor is the shrimp population in a bay. Biotic factors are living factors that affect organisms in an ecosystem. The biotic factors includes the producers or autotrophs, consumers or heterotrophs, and decomposer. Abiotic factors on the other hand are the non-living factors that influence an ecosystem; they include, sunlight, soil, humidity, etc
Hormones glucagon and insulin are produced in the alpha and beta cells respectively in the Islet of Langerhan in the pancreas. They are involved in the negative feedback system of blood glucose regulation in homeostasis.
GLUCAGON: when there is a low blood glucose concentration, the pancreas detect this and alpha cells produce and release glucagon. Glucagon causes the cells of the body to absorb less glucose from the blood. It also inhibits the process of converting glucose into glycogen (glycogenesis) and cause gluconeogenesis (process of converting amino acids/proteins and lipids/fats into glucose) and glycogenolysis (conversion of glycogen to glucose). Finally, glucagon decreases the rate of respiration so less glucose is required.
INSULIN: when blood glucose is high, insulin is released. Insulin binds with cell surface receptors of cells and activates the enzymes attached to the receptor. The enzymes cause a conformational change in the structural proteins that surround glucose transport protein containing vesicles, causing them to move out of the way so the vesicles migrate up to the cell membrane and glucose transport proteins can fuse with it. Thus, more glucose can be taken in by cells. Insulin also cause glycogenesis (converting glucose into glycogen) and inhibits gluconeogenesis and glycogenolysis.
Basically insulin decreases blood glucose concentration (eg. after eating) and glucagon increases it (eg. skipping breakfast in the morning)
This could be that the patients ovaries are unable to produce eggs anymore or have a diminished ovarian reserve and produce few eggs...
<span>Foods that are highly acidic tend to inhibit bacteria growth. Many times, bacteria do not acclimate well to acidic environments, so having a food with a very low pH will help to make sure that the bacteria can't thrive in such an environment. Fruits and vegetables are good examples of these types of food.</span>
Differentiation occurs numerous times during the development of a multicellular organism as it changes from a simple zygote to a complex system of tissues and cell types.
