Biochemistry 2300A Quiz 8 (Version C)

Document Sample
Biochemistry 2300A Quiz 8 (Version C) Powered By Docstoc
					Dr. Kevin Smith                 Biochemistry 2300A Quiz 8 (Version C)                       15 minutes

NAME:           ANSWER KEY                                Student No.:

Section I.    Multiple Choice. Circle the ONE BEST ANSWER.               [9 questions x 1 mark = 9 marks ]

1.     What would be the approximate weight gain of a person who consumes an excess of 500 kcal daily
       for one month?

       A)     0.5 lb
       B)     2 lbs
       C)     4 lbs (1 lb of body fat is 87% fat = approx. 3500 kcal)         p. 241 of text
       D)     6 lbs

2.     After consuming a very large meal, the desire to eat a slice of chocolate cake is an example of
       behaviour known as:

       A)     satiety
       B)     hunger
       C)     appetite               see page 243
       D)     pigging out

3.     What are the effects on fat digestion (hydrolysis) and absorption after a person switches to a high-fat
       diet? ?

       A)     both digestion and absorption efficiencies are increased       see page 243
       B)     both digestion and absorption efficiencies are decreased
       C)     absorption efficiency is increased but digestion is not affected
       D)     digestion efficiency is increased but absorption is not affected

4.     What is the most satiating macronutrient?

       A)     fat
       B)     water
       C)     protein                see page 244 - 245
       D)     carbohydrate

5.     Which of the following describes the process of thermogenesis?

       A)     burning of fat
       B)     synthesis of fat
       C)     generation of H2O
       D)     generation of heat             see page 246
6.    What fraction of the day’s energy expenditure of the average person is represented by the basal

      A)     approx. 10%
      B)     up to 50%
      C)     approx. 66%                   see page 246
      D)     over 90%

7.    Which of the following is a feature of the BMR?

      A)     fever decreases BMR
      B)     fasting increases BMR
      C)     pregnancy increases BMR           see page 247
      D)     females have a higher BMR than males of equal body mass

8.    What is the major factor that determines BMR?

      A)     age
      B)     gender
      C)     amount of fat tissue
      D)     amount of lean body tissue            see page 246 - 247

9.    What is the approximate value of the thermic effect of a 2500 kcal diet?

      A)     25 kcal
      B)     250 kcal               see page 246 - 248
      C)     400 kcal
      D)     1600 kcal

Calculation: (Show your work)                                                                     [ 4 marks ]

1.    What is the approximate BMI of a 20 year old woman who is 5 ft, 5 inches tall and 125 lbs?
                (NOTE: 12 inches in a ft, 1 inch = 2.54 cm, 100 cm = 1 m, 2.2 lbs = 1 kg)

                                                                  see page 251

                                                                                      BMI ANSWER: