Answer to Question 1
Vitamin K functions as a coenzyme in a variety of reactions that ultimately constitute the life-or-death process by which blood clots form. For your blood to coagulate and form a clot, a cascade of chemical reactions must first take place. After a cut or scrape occurs, various clotting factors are activated by vitamin K, allowing the next reactions in the cascade to take place. These reactions ultimately result in the production of fibrin, a protein that forms a web-like clot that stops the bleeding.
Answer to Question 2
When vitamin D intake is inadequate in adults, bones can become soft and weak-a condition called osteomalacia. Symptoms of osteomalacia include diffuse bone pain and muscle weakness. People with osteomalacia are also at an increased risk of bone fractures.Inadequat e vitamin D intake can also result in the demineralization of previously healthy bone, ultimately leading to osteoporosis. Osteoporosis is a serious chronic disease-especially in the elderly-that affects more than 28 million Americans.
Synthesis of the active hormone formed from vitamin D or its precursor in skin.
A parish nurse checks the blood pressure of a church member
Aneurysm. Photograph of the aorta, the large blood vessel arising from the heart, with a large bulge
Levels of Ghrelin in Human Blood Plasma
Blood Flow Through the Cardiorespiratory System
Structure of hemoglobin, the oxygen-transporting protein of red blood cells. It consists of four glo