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When a hemoglobin molecule is recycled by spleen macrophages, what happens to the iron?

Inside the spleen, what sort of cell recycles worn-out red blood cells?

Most of the elemental iron found in the human body is stored in the:

What is the primary metal ion catalyst in a catalytic converter?

Pictured is a venous blood sample of a heavy smoker. What gas is responsible for the color?

Carbon monoxide is a common by-product of burning fossil fuels: gasoline, diesel, and natural gas).

Which blood samples indicated are rich in oxyhemoglobin?

A patient presents with widespread musculoskeletal pain, fatigue, and sleep disturbances, reporting heightened sensitivity to pain with no underlying inflammation. Which of the following is most consistent with a diagnosis of fibromyalgia?  

Jane is a 17 year old girl who presents for fatigue with intermittent abdominal bloating and cramps over the past few months, She has noticed pale stools and a NEW onset of intermittent diarrhea and correlates with food intake but no diary obtained. She is concerned  about her abdominal bloating and gas.  She has a lost 10lbs over the past 2 months without dieting. PMH: Type 1 diabetes mellitus [autoimmune diabetes], but is adherent to treatment and within treatment goal Meds: She is sexually active, and takes oral contraceptives. Which of the following are the priority in the diagnosis and management of Jane with her history? 

Which of the following is NOT an influence on sleep patterns?