As you know, one of the primary functions of the kidneys is…

As you know, one of the primary functions of the kidneys is to filter blood–removing waste products and converting the filtrate into urine.  The kidneys also synthesize an enzyme needed for the formation of the hormone calcitriol, which increases the absorption of calcium from the small intestine to increase blood calcium concentration. Further, in response to low blood oxygen levels, cells within the kidney secrete the hormone, erythropoietin (EPO). EPO increases the rate of erythrocyte formation. Considering the many varied functions of the kidney, which of the following would accompany a loss of kidney function?

 Seasonal affective disorder (SAD) is a type of depression t…

 Seasonal affective disorder (SAD) is a type of depression that afflicts some people during the winter months, when day length is short. Full spectrum bright light therapy provides relief for some people. It entails repeated doses of several hours of exposure to artificial light that is as bright as sunlight. SAD is thought to be due in part, to the overproduction of a hormone released from the pineal gland. This hormone is ___