Answer to Question 1
Vitamin A contributes to the health of the bones. This vitamin affects the expression of genes (DNA into protein), which can affect cell development. If vitamin A is deficient, the cells that build bone may not be fully functional. This could affect the quality of the bone tissue.
Vitamin D is essential for bone health. It stimulates the small intestine to absorb more calcium from foods so that the bones can make use of the calcium. Young people who lack vitamin D during growth may have softened, misshapen bones, as is seen with rickets. Older individuals may experience softening of the bones as calcium is released from them as a result of vitamin D deficiency. This condition is known as osteomalacia.
Vitamin C is needed for the formation of collagen, the base material of bones and other connective tissues. Vitamin C deficiency, known as scurvy, leads to poorly formed connective tissue, which can cause bleeding of the gums or rashes on the skin.
Answer to Question 2
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Attack systems of pathogenic bacteria.
Effects of Living in Total Darkness on Monoaminergic Systems
Incorrect body alignment with back bent and head forward.
Effleurage over sternum. Apply with the palm of the hand between breast tissue. Omit this technique ...
Body sites where the peripheral pulse is most easily palpated
Summary of Homologous Structures of the Female and Male Reproductive Systems