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Test 2

Fill in the blanks. Movement of materials in and out of cells is controlled by the_________________. The sites of protein synthesis are______________________. Glycerol and fatty acids combine to form___________________. Breakdown of organic nutrients in cells to release energy and form ATP is called_________________. In a__________________reaction, smaller molecules are combined to form a larger molecule. The building units of proteins are____________________. Choose the correct answer. Which of the following are functions of nucleic acids? They pass instructions from parents to offspring. They help make proteins. They contain instructions for proteins. all of the above. Types of lipids include: polysaccharides. amino acids. nucleotides. triglycerides. According to the fluid mosaic model of membrane structure, proteins of the membrane are mostly spread in a continuous layer over the inner and outer surfaces of the membrane. confined to the hydrophobic int...
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What is Rickets?

Rickets is a bone disease in children that is the result of a deficiency of vitamin D. The signs of rickets include bowed legs, defects in the spine or pelvis, and, on occasion, muscle weakness. Other signs include low blood calcium levels and an increased tendency for fractures. 

The primary cause of rickets is a deficiency of vitamin D. Vitamin D aids in the absorption of calcium in the digestive tract. When vitamin D levels are low, less calcium is obtained from the diet. This lack of calcium leads to the skeletal defects characteristics of rickets. 
The obvious treatment for rickets is to increase the levels of vitamin D. This can be accomplished by increased exposure to sunlight and increasing the intake of foods rich in vitamin D, such as eggs yolks and fish oils.



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