Discuss the theories of aging and how caloric restriction may serve to prolong life.
What will be an ideal response?
(answers may vary) Theories of aging can be examined from two perspectives: programmed aging theories and "wear-and-tear" theories.Programmed aging theories include Hayflick's theory of limited cell replication and the molecular clock theory. Wear-and-tear theories of aging include the free-radical or oxidative stress theory and the rate of living theory.Studies have shown that caloric restriction, especially in midlife, results in longer life spans. One mechanism might be that it leads to changes in cell signaling pathways that induce metabolic reprogramming and subsequent life extension.
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Long-chain fatty acids are water soluble and travel freely in blood and lymph
Indicate whether the statement is true or false
Foods that are major sources of starch include:
a. fruits. b. meats. c. legumes. d. milk.
A condition caused by low body water and sodium content due to excessive loss of water through sweat in hot weather is called:
a. hyperhydration. b. heat stroke. c. heat exhaustion. d. hyponatremia.
Which aspect of the PES statement is described as the diagnostic label?
a. Etiology b. Problem c. Signs d. Possibility e. Symptoms