NFS284H1 Study Guide - Endoplasmic Reticulum, Cytosol, Nutrient Density

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28 Jan 2013
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NFS 284 TERM TEST Practice Questions. Select the best answer.
1)
Which statement best describes positive energy balance?
A)
Positive energy balance refers to a situation in which an individual's energy intake exceeds the number of
calories expended to maintain body function and physical activity. The individual gains weight.
B)
Positive energy balance refers to a situation in which an individual's energy intake is less than number of
calories expended to maintain body function and physical activity. The individual gains weight.
C)
Positive energy balance refers to a situation in which an individual's energy intake is less than the number
of calories expended to maintain body function and physical activity. The individual loses weight.
D)
Positive energy balance refers to a situation in which an individual's energy intake is equal to the number
of calories expended to maintain body function and physical activity. A constant weight is maintained.
2)
Which is a characteristic of a villus?
A)
It contains a blood vessel which can transport alpha-linolenic acid from the small intestine to the liver.
B)
It contains a layer of chief cells that secrete digestive enzymes.
C)
It contains a lacteal which can transport vitamin A from the enterocyte to the body.
D)
It contains a layer of cells that digest carbohydrates by secreting amylase.
3)
Which statement best describes the functional significance of the villi and microvilli?
A)
Compared to a smooth tubular organ, the villi and microvilli (or brush border) increase the surface area of
the small intestine, making absorption more efficient.
B)
Compared to a smooth tubular organ, the villi and microvilli (or brush border) decrease the surface area of
the small intestine, making elimination more efficient.
C)
Compared to a smooth tubular organ, the villi (or brush border) and microvilli increase the surface area of
the small intestine, making digestion less efficient.
D)
Compared to a smooth tubular organ, the villi (or brush border) and microvilli increase the surface area of
the small intestine, making elimination more efficient.
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4)
Consider the following experiment. The dietary intake of 90,000 individuals was recorded. The population's
health was followed for 10 years. The dietary information was analyzed for the use of calcium supplements
and health records evaluated fo the incidence of colon cancer.
RR for colon cancer
Users of calcium supplements 0.90*
Non-users of calcium supplements 1.00*
*The difference between relative risks is statistically significant.
A)
This is an intervention trial and indicates that increased calcium supplement use is associated with a
decreased risk of colon cancer
B)
This is an observational study and indicates that increased calcium supplement use is associated with a
decreased risk of colon cancer.
C)
This is an observational study and indicates that increased calcium supplement use has no effect on the
risk of colon cancer.
D)
This is an observational study and indicates that increased calcium supplement use is associated with an
increased risk of colon cancer
5)
Homer consumes 35% kcal from fat, while Moe consumes 31% kcal from fat. Which person consumes more fat
in total grams?
A)
It is not possible to determine wich person consumes more fat (in total grams) because we do not know the
total weight of food consumed by each person.
B)
Homer consumes more fat (in total grams) than Moe.
C)
It is not possible to determine which person consumes more fat (in total grams) because we do not know
the total kcal consumed by each person.
D)
Moe consumes more fat (in total grams) than Homer.
6)
Which term best describes a compound that stimulates the growth of beneficial microflora in the large intestine?
A)
Dietary fibre
B)
Probiotic
C)
Acid
D)
Prebiotic
7)
Which characteristic of the mother would you expect to be associated with an increase in exclusive
breastfeeding?
A)
Single parenthood
B)
Use of alcohol
C)
Use of cigarettes
D)
High level of education
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