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181 Cards in this Set

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Carbohydrates are compounds containing

Hydrogen, oxygen, & carbon. They are classified as sugars (complex)(cellulose), starches (complex), & fiber.

The definition of sugar, as it would appear on a food label, is

Any monosaccharide or disaccharide.

A monosaccharide is a

Single sugar unit, many of which are connected to make:


starch (the storage form of carbohydrates in plants)


Glycogen (the storage form of carbohydrates in humans)

Monosaccharides include

Glucose (blood sugar)


Fructose (fruit sugar)


Galactose

There are 3

Disaccharides are

2 sugar units including :


Sucrose (common sugar)


Lactose (milk sugar)


Maltose

There are 3

Polysaccharides are

Long chains of monosaccharide units linked together, found in foods containing starch & fiber.

Polysaccharides are often called

Complex carbohydrates , Including starch found in plants, seeds, & roots.

Complex carbohydrates are primarily

Starch & fiber, & the starch is digested to glucose.

What is a part of the plants that cannot be digested by human got enzymes?

Dietary fiber

Dietary fiber passes through what? How is it expelled?

The small intestine & colon


Fecal material/fermented & used as food by the good bacteria.

Carbohydrates help to regulate what?

Digestion & utilization of protein & fat.

Simple sugars can be easily___ & are found in ___.

Digested


Honey & fruits

Double sugars, such as table sugar, require what?

Some digestive action.

Starches, such as those found in whole grain, require what type of digestion?

Prolonged enzymatic action to be broken down into simple sugars (glucose) for utilization.

Cellulose is commonly found in what? How is it digested?

The skins of fruits & vegetables


They are largely in digestible by humans, contributing little energy value to the diet.

What provides the bulk necessary for intestinal motility & aids in elimination?

Cellulose

Glycemic index G.I. is the rate at which

Ingested carbohydrates raise blood sugar & it’s accompanying effect on insulin.

How is the G.I. for food determined?

When the particular food is consumed by itself on an empty stomach.

What can alter the glycemic affect of single foods?

Mixed meals of proteins


Other carbohydrates


Fat

There are 3 ways

Foods lower on the glycemic index are good sources of

Complex carbohydrates


High in fiber & there are two overall nutritional value

There are 2

Glycemic index (G.I.) :

Back (Definition)

Glycemic index (GI) for assorted foods :

Back (Definition)

Through the process of digestion and absorption, all disaccharides & polysaccharides are ultimately converted into what?

Simple sugars such as fructose or glucose.

Gradual breakdown of large starch molecules by enzymes in digestion :

Back (Definition)

Fructose must be converted into what before it can be used for energy?

Into glucose in the liver.

Some of the glucose blood sugar is used as fuel by tissues of the

Brain


Nervous system


Muscles

Because humans are periodic eaters, a small portion of glucose is converted into what? Where is it stored?

Glycogen after a meals


Within the liver & muscles.

Any excess glycogen gets converted into what? Where is the store?

Converted into fat


Stored throughout the body as a reserve source of energy.

When total caloric intake exceeds output, any excess carbohydrate, dietary fat, or protein may be stored as what?

Body fat until the energy expenditure once again exceeds energy input.

What is one of the greatest contributions made by dietary complex carbohydrate?

Fiber

Higher intakes of dietary fiber are associated with what?

Lower incidence of heart disease & certain types of cancers.

Fiber is what type of carbohydrate?

Indigestible

What are the 2 types of dietary fiber?

Soluble


Insoluble

Soluble fiber is

Dissolved by water & forms a gel like substance in the digestive tract.

What are the benefits of soluble fiber?

Moderating blood glucose levels


Lowering cholesterol

What are some good sources of soluble fiber?

Oatmeal


Oats


Legumes (peas, beans, lentils)


Barley


Many uncooked fruits & vegetables (oranges, apples, carrots)

There are 4

Insoluble fiber is

Not able to absorb or dissolve in water. It passes through the digestive tract close to its original form.

What are some of the benefits of insoluble fiber to intestinal health?

Reduction in the risk/occurrence of :


Colorectal cancer


Hemorrhoids


Constipation

There are 3

Where does most of insoluble fiber come from?

The bran layers of cereal grains.

What is the recommended intake of fiber per day?

38 g


25 g for young women/men

Additional benefits of fiber include :

Back (Definition)

What is vital for maximal sports performance?

Carbohydrate availability.

When performing high intensity, short duration activity (anaerobic), muscular demand for energy is

Provided for & dependent on muscle glycogen.

What percentage of energy need does muscle glycogen provide during endurance exercise aerobic performed at a moderate intensity (60% VO2 max)?

~50% of energy needs.

During high intensity aerobic exercise, muscle glycogen provides what percentage of energy need?

It yields nearly all of the energy needs.

As duration of activity increases, available glucose & glycogen ___, increasing the ___ as a fuel source.

Diminish


Reliance on fat.

If there is an appreciable increase in duration, there must also be a

Decrease in intensity, decreasing the use of glycogen.

Glycogen

If the workout contributes to a caloric deficit, the body will draw on

It’s fat stores to make up for the deficit.

Fat burns in a ___, maximal fat utilization cannot occur without ___ to continue Krebs cycle activity.

Carbohydrate flame


Sufficient carbohydrate

When an endurance athlete hits the wall, it is the result of

Fatigue caused by severely lowered liver & muscle glycogen.

What is the recommended amount of carbohydrates that should be included in your diet per day?

Between 6 & 10 g/kg

According to the Institute of medicine, the acceptable macronutrient distribution range for carbohydrate intake for an adult is what?

45%-65% of total caloric intake.

Complex carbohydrates (whole grains, fresh fruits& vegetables) should constitute how many of your calories? Why?

The majority of your calories.


Because of their nutrient dense nature (providing B vitamins, iron, fiber).

High-carbohydrate diet’s increase the use ___ as fuel, whereas a high-fat diet increases the use of ___ as fuel.

Glycogen as fuel.


Fat as fuel.

A high fat diet results in what? When is this a concern?

A lower Glycogen synthesis.


When the individual is consuming a reduced energy diet.

What type of diet will aid in performance in recovery for an endurance athlete?

A carbohydrate-rich diet.

Those on a high-fat diet Performing at a relatively low intensity (less than 70% VO2 max) will see ___. As the intensity of the exercise increases, performance of a high intensity exercise will be ___.

Improvements


Impaired

It is recommended that an individual consumer high carbohydrate diet meal how many hours before exercising? How long should they be exercising?

2-4 hours


For more than an hour.

Allows time for appropriate gastric emptying before exercise.

A mill replacement formula maybe used when? When is it the most helpful?

Time constraints


For morning workouts (glycogen stores are lowered by as much as 80%)

What should you do to avoid Gastrointestinal distress when eating closer to exercise sessions?

Eat smaller meals closer to the exercise session.

A carbohydrate intake of 1-4.5 g/kg between 1-4 hours before exercise does what?

Improves performance by 15%.

Carbohydrate loading, also called glycogen supercompensation, is a technique

Used to increase muscle glycogen before and endurance event. (>90mins, Marathon run)

Carbohydrate loading (glycogen supercompensation) does what to glycogen stores?

Doubles muscle glycogen stores, increasing endurance potential.

Sports beverages containing what percentage of carbohydrates are recommended for exercise lasting longer than 1 hour?

6%-8% carbohydrates

What percentage of macro nutrient calories should carbohydrates make up when someone is attempting fat loss or muscle game?

The highest percentage.

Glycogen loading schedule :

Back (Definition)

Is there any need for one to reduce carbohydrate percentage to lose fat?

No.

A diet that is centered around low glycemic index carbohydrates may be useful in the prevention of what?

Obesity


Coronary artery disease


Breast cancer


Colon cancer

4 diseases

The weight lost on a low-carbohydrate diet can be contributed to 2 factors, what are they?

Low calorie intake


Lots of fat free mass (FFM)

If an individual begins dropping carbohydrate rich foods from their diet, it is inevitable that

Caloric intake will drop as well.

Calories

For every gram of glucose taking out of glycogen, it brings with it

2.7 g of water

The loss of my muscle glycogen including water can be quite significant in the ___ of a low carbohydrate diet, adding to the ___ on the scale.

First week


Pounds lost

Long-term success in weight loss is associated with what?

A realistic eating style, not one that severely limits/omits one of the macronutrients.

How long is carbohydrate loading (glycogen supercompensation) program? How does it work?

It’s a week long process.


Glycogen depletion - 4 days (Low carbohydrate diet ~10% of calories & exhaustive exercise)


Rest & high-carbohydrate diet - 3 days (~90% of calories).

There is no change it is constant throughout the years.

There is no change it is constant throughout the years.

The data from NHANES III has shown an increase in what? What do these findings support?

Total Energy intake.


The relationship of excessive energy intake leading to increased fat stores.

What are the 2 primary variables responsible for the dramatic rise in obesity over the past 2 decades?

An increased energy intake


A reduction in energy expenditure

What percentage of the American population does not partake, on a daily basis, in 30 minutes of low to moderate physical activity?

More than 75%

Americas increasing problem of obesity is not a direct result of carbohydrate intake, but rather of

Energy imbalance.

1 g of carbohydrate yield 4 calories. Carbohydrates provide the body with :

Back (Definition)

The body needs carbohydrates because :

Back (Definition)

Recommended carbohydrate intake :

Back (Definition)

Lipids

A group of compounds that includes triglycerides (fats & oils), phospholipids, & sterols.

95%

95%

What are some of the drawbacks of carbohydrate loading (glycogen supercompensation)?

Periods of hypoglycemia


Irritability


Increased susceptibility to injury


Difficulty in compliance

There are 4

In the body, what percentage of stored lipids are also triglycerides?

99%

Structurally, what are triglycerides?

3 fatty acids attached to a glycerol backbone.

1 g of carbohydrate yield 4 calories. Carbohydrates provide the body with :

Back (Definition)

The body needs carbohydrates because :

Back (Definition)

Recommended carbohydrate intake :

Back (Definition)

If a fatty acid has more than one points of unsaturation what is it classified?

A Polyunsaturated fatty acid.

Poly unsaturated fats provide important

Essential fatty acids (fats that cannot be manufactured by the body, essential for proper health and functioning).

What are saturated fatty acids implicated as a risk factor for? Why?

Heart disease


Because they raise bad cholesterol levels (low density lipoprotein‘s [LDL]).

Unsaturated fats are associated with Increasing what? What do they decrease?

Good cholesterol (high density lipoproteins [HDL])


The risk of heart disease.

Glycogen loading schedule :

Back (Definition)

What do some athletes experience when attempting glycogen loading?

Extreme gastrointestinal


Diarrhea

There are 2

Why do many athletes complain that they feel heavy or sluggish when attempting glycogen loading?

Because leg muscles become heavier with the addition of glycogen & water.

What can you do during exercise to help supply glucose to working muscles where glycogen stores dwindling?

Do carbohydrate feedings for exercise lasting more than 1 hour.

Carbohydrate feedings helps to maintain what? What does it increase?

Blood glucose levels


It increases time to exhaustion by 20-60 mins.

It is recommended that endurance athletes consume how many grams of carbohydrates every hour?

30-60 g of carbohydrates

Sports beverages including potassium and sodium help to replace what? Carbohydrates provide what?

Electrolytes


Energy

Olive & canola oils

Olive & canola oils

What does vitamin D aid in?

The absorption of calcium, making it available to body tissues (bones & teeth).

That’s are involved in the following :

Back (Definition)

Digestion of dietary fat starts in the ___, moves to the ___, & is completed in the ___.

Mouth


Stomach


Small intestine

In the intestine, the fat interacts with the ___, to become emulsified so that the ___ can break down the triglycerides into ___.

Bile


Pancreatic enzymes


2 fatty acids & monoglyceride.

Absorption of these constituents (2 fatty acids & monoglyceride) occurs through what?

The intestinal wall into the blood.

In the intestinal wall, they are reassembled into ___ that are then released into the lymph in the form of a ___.

Triglycerides


Lipoprotein called chylomicron.

Digestion, absorption, & utilization of dietary fats

Chlyomicrons from the lymph move to where?

The blood

The triglyceride contents of chylomicron is removed by What action? What is released?

The enzyme lipoprotein lipase (LPL).


Fatty acids, they are then taken up by the tissues.

Throughout the day, triglycerides are constantly cycled

In & out of tissues including muscles, organs, & adipose.

Clients will eventually overeat unless they are satiated by what?

The amount of calories necessary to allow that loss or energy balance.

What can polyunsaturated fatty acids (omega-3 fatty acids) be found in?

Coldwater fish (salmon)

According to the Institute of medicine, what is the acceptable percentage of macronutrient distribution for fat intake for an adult?

20%-35% of total caloric intake.

How does the thermic effect of fat compare to other macronutrients?

Fat has a lower thermic effect.

The thermic effect of food (TEF) is

The rise in metabolic rate that occurs after food is ingested.

TEF typically amounts to what percentage of ingested calories?

10%

As fat percentage in the diet increases the amount of heat given off TEF, does what?

The TEF decreases.

As carbohydrate percentage in the diet increases, TRF does what?

TEF increases.

It is ___ to convert dietary fat to body-fat stores.

Metabolically inexpensive.

What percentage of the calories in fat are required to store it as fat?

3%

What percentage of the calories in carbohydrates does it take to convert to body fat?

23%

Dietary fats stimulate the release of what hormone? What does it do?

Cholecystokinin (CKK)


It signals satiety.

Monounsaturated fatty acids & Polyunsaturated fatty acids are considered to have favorable effects on what? They may play a role in the treatment and prevention of what?

Blood lipid profiles


Heart disease, hypertension, arthritis, & cancer.

What does fat slow? What does it assist?

It slows the digestion of foods the nutrient content in the bloodstream)


It assist with blood sugar stabilization.

The reduction of blood sugar fluctuations can contribute to what?

Satiety.

What do a tablespoon of oil & a large salad with nonfat dressing have in common?

The same amount of calories.

Because satiety is achieved by more than just caloric intake, this low volume, high calorie contribution of fat may not

Satisfy other peripheral satiation (mechanisms chilling, swallowing, stomach distention), leading to over eating (hyperfagia).

What is hyperphagia?

Over eating

Fat is digested & absorbed ___.

Quite slowly

Long chain triglycerides (LCT), which make up the majority of ___, must go through the process of ___ before they can be utilized.

Dietary fatty acids (16-18 carbons


Digestion & absorption.

Medium chain triglycerides MCT, are ___ absorbed.

More rapidly.

Medium chain triglycerides (MCT) do not require what?

Incorporation into the chylomicrons for transport.

How to medium chain triglycerides (MCT) get through the body? What do they provide?

They enter the systematic circulation directly through the portal vein.


Providing readily available, concentrated source of energy.

The triglyceride molecule :

Back (Definition)

Fatty Acids :

Back (Definition)

What are trans fatty acids?

The result of Hydrogenation (adding hydrogen to unsaturated fatty acids making them harder at room temp to increase shelflife).

Trans fatty acids have been shown to increase what? What do they decrease?

I : Low-density lipoprotein’s (LDL) cholesterol


D : High-density lipoprotein’s (HDL) cholesterol

Similar to saturated fats

What is the most concentrated source of energy in the diet?

Lipids or fats

1 g of fat yields approximately how many calories when oxidized?

9 cal

More than 2X the calories per gram of carbohydrates or proteins.

Fat access carriers for what vitamins?

Fat soluble vitamins A, D, E, & K.

Olive & canola oils

Olive & canola oils

What does vitamin D aid in?

The absorption of calcium, making it available to body tissues (bones & teeth).

That’s are involved in the following :

Back (Definition)

The triglyceride molecule :

Back (Definition)

Fatty Acids :

Back (Definition)

Absorption of these constituents (2 fatty acids & monoglyceride) occurs through what?

The intestinal wall into the blood.

In the intestinal wall, they are reassembled into ___ that are then released into the lymph in the form of a ___.

Triglycerides


Lipoprotein called chylomicron.

Digestion, absorption, & utilization of dietary fats

Chlyomicrons from the lymph move to where?

The blood

The triglyceride contents of chylomicron is removed by What action? What is released?

The enzyme lipoprotein lipase (LPL).


Fatty acids, they are then taken up by the tissues.

Throughout the day, triglycerides are constantly cycled

In & out of tissues including muscles, organs, & adipose.

Clients will eventually overeat unless they are satiated by what?

The amount of calories necessary to allow that loss or energy balance.

That’s are involved in the following :

Back (Definition)

According to the Institute of medicine, what is the acceptable percentage of macronutrient distribution for fat intake for an adult?

20%-35% of total caloric intake.

How does the thermic effect of fat compare to other macronutrients?

Fat has a lower thermic effect.

The thermic effect of food (TEF) is

The rise in metabolic rate that occurs after food is ingested.

TEF typically amounts to what percentage of ingested calories?

10%

As fat percentage in the diet increases the amount of heat given off TEF, does what?

The TEF decreases.

As carbohydrate percentage in the diet increases, TRF does what?

TEF increases.

It is ___ to convert dietary fat to body-fat stores.

Metabolically inexpensive.

What percentage of the calories in fat are required to store it as fat?

3%

What percentage of the calories in carbohydrates does it take to convert to body fat?

23%

Dietary fats stimulate the release of what hormone? What does it do?

Cholecystokinin (CKK)


It signals satiety.

Monounsaturated fatty acids & Polyunsaturated fatty acids are considered to have favorable effects on what? They may play a role in the treatment and prevention of what?

Blood lipid profiles


Heart disease, hypertension, arthritis, & cancer.

What does fat slow? What does it assist?

It slows the digestion of foods the nutrient content in the bloodstream)


It assist with blood sugar stabilization.

The reduction of blood sugar fluctuations can contribute to what?

Satiety.

What do a tablespoon of oil & a large salad with nonfat dressing have in common?

The same amount of calories.

Because satiety is achieved by more than just caloric intake, this low volume, high calorie contribution of fat may not

Satisfy other peripheral satiation (mechanisms chilling, swallowing, stomach distention), leading to over eating (hyperfagia).

What is hyperphagia?

Over eating

Fat is digested & absorbed ___.

Quite slowly

Long chain triglycerides (LCT), which make up the majority of ___, must go through the process of ___ before they can be utilized.

Dietary fatty acids (16-18 carbons


Digestion & absorption.

Medium chain triglycerides MCT, are ___ absorbed.

More rapidly.

Medium chain triglycerides (MCT) do not require what?

Incorporation into the chylomicrons for transport.

How to medium chain triglycerides (MCT) get through the body? What do they provide?

They enter the systematic circulation directly through the portal vein.


Providing readily available, concentrated source of energy.

The triglyceride molecule :

Back (Definition)

Fatty Acids :

Back (Definition)

What are trans fatty acids?

The result of Hydrogenation (adding hydrogen to unsaturated fatty acids making them harder at room temp to increase shelflife).

Trans fatty acids have been shown to increase what? What do they decrease?

I : Low-density lipoprotein’s (LDL) cholesterol


D : High-density lipoprotein’s (HDL) cholesterol

Similar to saturated fats

What is the most concentrated source of energy in the diet?

Lipids or fats

1 g of fat yields approximately how many calories when oxidized?

9 cal

More than 2X the calories per gram of carbohydrates or proteins.

Fat acts as carriers for what vitamins?

Fat soluble vitamins A, D, E, & K.