Option A – Human nutrition and health
Components of the human diet
A nutrient is a chemical substance found in foods that is used in the human body. The nutrients needed in the human diet are amino acids, fatty acids, minerals, vitamins and water. Metabolic fuel is often supplied from carbohydrates and fats, which are almost, always present in human diets but specific carbohydrates are not essential. * Metabolic fuel can also be supplied from proteins. Chemical energy is all the fuels are transferred into a required movement/action (contracting muscle) by respiration. * Combined nitrogen required for the building of proteins. They have to be hydrolyzed to their constituent amino acids for them to work. * Vitamins are
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Thyroxine) are manufactured from the amino acid tyrosine + the mineral iodine. Thyroid hormones affect all body cells. They cause an increase in the rate of energy production (aka basal rate of metabolism).
Iodine deficiency common in many countries since most food normally have little iodine. Sea food good source of iodine. If not added to the diet people develop swelling of thyroid glands, this causing goite. + in pregnant women can cause the child to be born with brain damage.
Highest rates found in countries where little iodine is present in soil (so crops) and drinking water.
Iodine deficiency can be prevented by the addition of salt.
Vitamin addition to diet
There is an increase in dietary supplements, specifically vitamin pills. However, little evidence of effectiveness. The use of vitamins is mainly popular in competitive athletes ad elderly, who are concerned about their decreasing health. But, they are also used when an individual lacks a specific mineral or vitamin.
Multivitamin capsules contain the recommended quantity of each vitamin. But, once the body is saturated with the required vitamins, excess vitamins can accumulate. Many vitamins are water-soluble and any excess is quickly excreted, but vitamins, which are not soluble, they accumulate can toxic does build up.
Energy in human diet
Energy content
Normally, the energy needed to sustain the process of metabolism, growth, repair, and other activities of
Each vitamin has its own importance within the body and the health. Vitamins are helpful for the health and life of the body in several ways that include:
Energy metabolism is where the nutrients oxygen and glucose are took in and delivered the organs. Energy is needed in order for our body to be able to function. Energy helps break down molecules and to build new molecules.
Metabolism is a chemical process that converts fuel from food into energy needed for the body’s activities. For example, thinking, running and jumping etc. are all an example of the bodies activities.
Week 3 – LOM Assignment The thyroid is responsible for taking iodine and converting it into thyroid hormones which are released into the blood stream and transported throughout the body where they control metabolism.1 The thyroid is a vital part of the human body as every cell in the body depends on it for metabolic regulation. Too much or too little thyroid hormone secretion can result in hyperthyroidism or hypothyroidism. Hyperthyroidism is caused when the thyroid secretes too many thyroid hormones. Hyperthyroidism causes a rapid heart rate, elevated blood pressure and tremors. Other symptoms include increased nervousness, inability to concentrate, weakness, restlessness, difficulty sleeping, frequent bowel movements, weight loss and irregular
Vitamins are a class of nutrients that contain carbon. Vitamins are needed in small amounts to maintain health and allow growth. There are two types of vitamins fat-soluble and water-soluble this means that they dissolve in fat and water. There are 4 fat-soluble vitamins A,D,E,K. Vitamin A keeps your eyes and skin looking healthy. It also is needed for the growth of bones and teeth. Vitamin D is the sunlight vitamin and helps absorb calcium. Vitamin E protects your cells and vitamin K clots your blood. All of these can be stored if you have extra as fat. The water-soluble vitamins need to be replenished daily because any extra will be discharged as waste. Water Soluble vitamins are any one that was not mentioned above. They are needed to produce
E. Metabolism – Organisms rely on complex chemical reactions to provide the energy for responsiveness, growth,
Introduction: Metabolism is a term in which defines all of the chemical reactions involving energy production. Some of these chemical reactions involve cellular respiration “by which is the series of metabolic process by which living cells produce energy through the oxidation of organic
Sustenance is such an astounding thing, it sustains us in such a large number of ways. From each nutritional category you get diverse supplements: minerals, vitamins, starches, fats, protein, fiber.
Iodine's most effective responsibility is within the formation of two thyroid hormones. Such a is thyroxin; which is required with the aid of the hair follicles and sebaceous glands for correct functioning. Thyroxin helps nourish these hair buildings. Iodine deficiencies can show up as premature grey hair, dull hair, and loss hair.
Supplements are intended to help out an athlete in areas where there may exist a deficiency. This could be a lack of protein, creatine or even testosterone. And because of this any substance taken to correct a deficiency could be considered a ‘supplement’ to the athlete’s diet – even the multi-vitamin he takes with breakfast.
Commonly, problems with the thyroid involve an abnormal production level of these hormones. It is called hyperthyroidism if there the thyroid hormones are overproduced, and this can cause things like Graves’ disease, Toxic adenomas, and subacute thyroiditis (7). Hypothyroidism is the underproduction of the hormones which can be caused by an inflamed thyroid, iodine deficiency, a non-functioning thyroid gland and more. Hypothyroidism is especially dangerous in infants and newborns as the lack of these thyroid hormones can lead to mental retardation and dwarfism (7). However, in humans hypothyroidism can be caused by things such as a pituitary disorder, a defective thyroid or a lack of the gland completely. (7)
Carbohydrate is a nutrient essential for energy production and the prevention of ketosis, a state where the production of ketones exceeds metabolism. Protein is a nutrient essential for its components, amino acids. Fat is a nutrient which provides insulation, protection and energy for the body.
The macronutrients (excluding fiber and water) provide structural material (amino acids from which proteins are built, and lipids from which cell membranes and some signaling molecules are built) and energy. Some of the structural material can be used to generate
Iodine is an essential trace element utilized in the synthesis of thyroid hormones and its deficiency may result in inadequate thyroid hormone production. Iodine deficiency disorders (IDDs) include mental impairment, goitre, complications in pregnancy including stillbirth and congenital anomalies (1). Inadequate iodine intake during pregnancy may also cause irreversible fetal brain damage (2).
Low iodine levels are linked to low IQ, poor thyroid function, low-body temperature - even cancer