Which term describes air that has been contaminated by tobacco smoke?

Plz help,I don’t understand.

zmey [24]

Answer:

Fat-soluble vitamins

Nutrient

Function

Sources

Vitamin A (and its precursor*, beta-carotene)

*A precursor is converted by the body to the vitamin.

Needed for vision, healthy skin and mucous membranes, bone and tooth growth, immune system health

Vitamin A from animal sources (retinol): fortified milk, cheese, cream, butter, fortified margarine, eggs, liver

Beta-carotene (from plant sources): Leafy, dark green vegetables; dark orange fruits (apricots, cantaloupe) and vegetables (carrots, winter squash, sweet potatoes, pumpkin)

Vitamin D

Needed for proper absorption of calcium; stored in bones

Egg yolks, liver, fatty fish, fortified milk, fortified margarine. When exposed to sunlight, the skin can make vitamin D.

Vitamin E

Antioxidant; protects cell walls

Polyunsaturated plant oils (soybean, corn, cottonseed, safflower); leafy green vegetables; wheat germ; whole-grain products; liver; egg yolks; nuts and seeds

Vitamin K

Needed for proper blood clotting

Leafy green vegetables such as kale, collard greens, and spinach; green vegetables such as broccoli, Brussels sprouts, and asparagus; also produced in intestinal tract by bacteria

Explanation:Nutrient

Function

Sources

Thiamine (vitamin B1)

Part of an enzyme needed for energy metabolism; important to nerve function

Found in all nutritious foods in moderate amounts: pork, whole-grain or enriched breads and cereals, legumes, nuts and seeds

Riboflavin (vitamin B2)

Part of an enzyme needed for energy metabolism; important for normal vision and skin health

Milk and milk products; leafy green vegetables; whole-grain, enriched breads and cereals

Niacin (vitamin B3)

Part of an enzyme needed for energy metabolism; important for nervous system, digestive system, and skin health

Meat, poultry, fish, whole-grain or enriched breads and cereals, vegetables (especially mushrooms, asparagus, and leafy green vegetables), peanut butter

Pantothenic acid

Part of an enzyme needed for energy metabolism

Widespread in foods

Biotin

Part of an enzyme needed for energy metabolism

Widespread in foods; also produced in intestinal tract by bacteria

Pyridoxine (vitamin B6)

Part of an enzyme needed for protein metabolism; helps make red blood cells

Meat, fish, poultry, vegetables, fruits

Folic acid

Part of an enzyme needed for making DNA and new cells, especially red blood cells

Leafy green vegetables and legumes, seeds, orange juice, and liver; now added to most refined grains

Cobalamin (vitamin B12)

Part of an enzyme needed for making new cells; important to nerve function

Meat, poultry, fish, seafood, eggs, milk and milk products; not found in plant foods

Ascorbic acid (vitamin C)

Antioxidant; part of an enzyme needed for protein metabolism; important for immune system health; aids in iron absorption

Found only in fruits and vegetables, especially citrus fruits, vegetables in the cabbage family, cantaloupe, strawberries, peppers, tomatoes, potatoes, lettuce, papayas, mangoes, kiwifruit

8 1

2 years ago

. <br> What component of fitness does swimming fall under?

murzikaleks [220]

Cardiovascular endurance

5 0

2 years ago

Write an essay (3-5 paragraphs) about why it is important to be physically active. You can write about the physical, emotional,

iren2701 [21]

Answer:

We all know that exercise is important in our daily lives, but we may not know why or what exercise can do for us.

It’s important to remember that we have evolved from nomadic ancestors who spent all their time moving around in search of food and shelter, travelling large distances on a daily basis. Our bodies are designed and have evolved to be regularly active.Exercise increases energy levels

Exercise improves both the strength and the efficiency of your cardiovascular system to get the oxygen and nutrients to your muscles. When your cardiovascular system works better everything seems easier and you have more energy for the fun stuff in life.

Exercise improves muscle strength

Staying active keeps muscles strong and joints, tendons and ligaments flexible, allowing you to move more easily and avoid injury. Strong muscles and ligaments reduce your risk of joint and lower back pain by keeping joints in proper alignment. They also improve coordination and balance.

Exercise can help you to maintain a healthy weight. The more you exercise, the more calories you burn. In addition, the more muscle you develop, the higher your metabolic rate becomes, so you burn more calories even when you’re not exercising. The result? You may lose weight and look better physically which will boost your self-esteem.

Exercise improves brain function

Exercise increases blood flow and oxygen levels in the brain. It also encourages the release of the brain chemicals (hormones) that are responsible for the production of cells in the hippocampus, the part of the brain that controls memory and learning. This, in turn, boosts concentration levels and cognitive ability, and helps reduce the risk of cognitive degenerative diseases such as Alzheimer’s.

Exercise is good for your heart

Exercise reduces LDL cholesterol (the type that clogs your arteries), increases HDL (the good cholesterol) and reduces blood pressure so it lowers the stress on your heart. Added to this, it also strengthens your heart muscle. Combined with a healthy diet, exercise lowers the risk of developing coronary heart disease.

Regular exercise lowers your risk of developing type 2 diabetes

Regular exercise helps to control blood glucose levels, which helps to prevent or delay the onset of type 2 diabetes. Additionally exercise helps to prevent obesity, which is a primary factor in the development of type 2 diabetes.

Exercise enhances your immune system

Exercise improves your body’s ability to pump the oxygen and nutrients around your body that are required to fuel the cells that fight bacteria and viruses.

Staying active reduces the likelihood of developing some degenerative bone diseases

Weight bearing exercise such as running, walking or weight training lowers your risk of both osteoarthritis and osteoporosis – the adage of “use it or lose it” really does apply to bones.

Exercise may help to reduce the risk of certain cancers

Being fit may mean that the risks of colon cancer, breast cancer and possibly also lung and endometrial cancers are reduced. Studies by the Seattle Cancer Research Centre have suggested that 35% of all cancer deaths are linked to being overweight and sedentary.Active people tend to sleep better

Physical activity makes you more tired so you’re more ready to sleep. Good quality sleep helps improve overall wellness and can reduce stress.

See our page The Importance of Sleep for more information.

Exercise improves your mood and gives you an improved sense of well-being

Physical activity stimulates the release of endorphins which make you feel better and more relaxed. These in turn improve your mood and lower your stress levels.

Exercise can help prevent and treat mental illnesses like depression

Physical activity can help you meet people, reduce stress levels, cope with frustration, give you a sense of achievement, and provide some important “me time”, all of which help with depression.

Keeping fit can reduce some of the effects of aging

6 0

2 years ago

18. the incidences of mouth, esophageal, and liver cancers are higher among alcoholics than those who do not abuse alcohol. true

Alexandra [31]

18) True
19) True
20) false
21) false
22) True