The process of digestion involves a __and__actions.
mechanical, chemical
The rhythmic contractions of the stomach and intestine that propel food along are called
peristalsis
An example of a gastric secretion is
hydrochloric acid
A pizza slice is being consumed by a hungry teen. The first actions of biting, chewing, and breaking up the slice into smaller particles is called
mastication
A food that begins digestion in the mouth is
bread
After a period of mixing and churning of the ingested food with the gastric secretions, the semifluid mass called
bolus
The release of gastric secretions is stimulated by
nerves, hormones, and the presence of food in the stomach
One type of movement in the small intestine is
segmentation
Compared with the pH in the stomach, the pH in the small intestine is
higher
The lining of the stomach and intestine is protected from strong acid by
mucus
The primary nutritional function of the large intestine is
absorption of water
Gas formation in the colon is the result of
bacterial action on undigested items
Digestion of dietary fiber occurs in the
NOT stomach, small intestine, large intestine
NONE of the above
The sum total of all the chemical changes that an organism performs to maintain its life and produce energy is the result of
metabolism
Two organs that work with the small intestine in digestion are the
pancreas and liver
Conversion of amino acids to glucose is called
gluconeogenesis
A beverage that may cause intestinal gas in adults is
milk
A nutrient that doesn't provide energy for the body is
vitamins
Energy is lost from the body as
heat
The unit of measurement used to refer to the amount of energy in food is the
kilocalorie
The total number of kilocalories in a snack that contains 10g carbohydrate, 2 g protein, and 5g fat is ____ kcal.
93
The external energy cycle includes
growing plants
After foods are eaten, they are converted into which of the following body fuels?
fatty acids and glucose
Fever causes the metabolic rate to
increase
The amount of energy the body needs to maintain life while at digestive, physical, and emotional rest is called the
basal metabolism
Metabolically active tissues in the body include
the heart, muscles, and intestine
In clinical practice, basal or resting energy expenditure is estimated by using
indirect calorimetry
The term for the effect of food intake on metabolic rate is
thermic effect of food
The sum of basal metabolism, energy, expended in physical activity, and thermic effect of food is known as
total energy requirement
When energy intake exceeds energy expenditure, the result can be
obesity
An activity that results in increased energy expenditure is
cleaning house
The body's sources of stored energy include
adipose tissue
Basal metabolic rate is controlled by the hormone
thyroxine
The first source of stored energy to be used during a period of fasting is
glycogen
Nutrient density means the
concentration of nutrients in a given amount of food
In cases of extreme starvation, the energy substrate most likely to be used as a last resort would be
muscle mass
Fever increases basal metabolic rate approximately ___ for each_____rise
7%, 1 F
Energy expenditure is increased by
physical exercise
Energy needs per pound of body weight
decrease with age
The person requiring the highest energy needs per unit of body weight is a
15-year-old boy
For a compound to be classified as a vitamin, it must
perform a vital function
A vitamin that behaves more like a hormone that a vitamin is vitamin
D
Spinach, carrots, and sweet potatoes are good sources of
beta carotene
A rich source of vitamin A(retinol) is
liver
An important function of vitamin A is to
help form the visual pigment rhodopsin in the eye
A deficiency of vitamin A may result in
night blindness
An excellent natural food source of vitamin D is
fish liver oils
Two foods that are commonly fortified with vitamin D are
milk, margarine
The primary function of vitamin D is to regulate the absorption and metabolism of the mineral
calcium & phosphorus
A vitamin D deficiency in growing children that results in the malformation of skeletal tissue, especially the long bones is referred to as
rickets
A toxic level of vitamin D is most likely to result in
calcification of soft tissue
A rich source of vitamin E is
sunflower oil
Vitamin E protects because it acts as
antioxidant
The fat-soluble vitamin for the synthesis of blood-clotting factors by the liver is vitamin
K
A good source of vitamin K is
spinach
An alcoholic is most likely to be deficient in
thiamin
The vitamin that is destroyed by light is
riboflavin
The most important source of riboflavin
milk
The disease with niacin deficiency is
pellagra
Which of the following diets can help ensure adequate and balanced vitamins intake?
a varied diet composed of all food groups eaten in controlled portions
The person most at risk for vitamin D deficiency is a
62 year old woman who lives in cold climate
The best source of folic acid is
broccoli
A folic acid deficiency induces a form of anemia called _____anemia
megaloblastic
Vitamin C deficiency is associated with
scurvy
A 62-year old woman who smokes 1 pack a day and whose food intake record indicate a minimal intake of vitamin C may be at risk for
easy bruising
An example of a meal high in vitamin C is
bacon, lettuce, tomato sandwich, and strawberries
A young woman who is interested in becoming pregnant should be counseled on healthy eating choices, especially regarding folate-containing foods, which may help
neural tube defects
A food ingredient that may provide a health benefit beyond its nutritional value is called
functional food
Overall calcium balance is mostly maintained by which two balanced regulatory agents?
Vitamin D and PTH
Optimal levels of body iron are controlled at the point of absorption, interrelated with a system of transport and storage. Which of the following statements correctly describes this iron regulating process
The iron form in foods requires an acid medium to reduce it to the form necessary for absorption
The only know function of fluoride in human nutrition is for dental heal. Which of the following statements correctly describes this relation?
fluoridation of the public water supply in small amounts helps prevent dental caries
Cretinism is a disorder in children to mother who had a deficiency of____during adolescence and pregnancy.
Iodine
Which mineral has the following functions: blood clotting, muscle and nerve action, and bone and teeth formation?
Calcium
Which of the following minerals is a trace amount mineral?
Iron
Chief electrolyte guarding the water outside cells
sodium
An ion carrying a negative electrical charge
anion
Sodium-conserving mechanism or control agent
active transport
Simple passage of water molecules through a membrane separating solutions of different concentrations from the side of lower concentration of solute particles to that of higher concentration of particles, thus tending to equalize the solutions
osmosis
A substance (element or compound) that, in solution, conducts an electrical current and is dissociated into cations and anions
electrolyte
Particles in solution, such as electrolytes and protein
solutes
State of dynamic equilibrium maintained by an organism among all its parts and controlled by many finely balanced mechanisms
homeostasis
Chief electrolyte guarding the water inside cells
potassium
Major plasma protein that guards and maintains blood volume
albumin
Fluid located inside the cell wall
ICF
An ion carrying a positive electrical charge
cation
The body's method of maintaining tissue water circulation by opposing fluid pressures
capillary fluid shift mechanism
Force exerted by a contained fluid
hydrostatic pressure
Movement of particles throughout a solution and across membranes outward from the area of denser concentration of particles to all surrounding spaces
diffusion
A type of fluid outside of cells
interstitial fluid
Movement of particles in solution across cell membranes and against normal osmotic pressures, involving a carrier and energy for the work
active transport