Patients with phenylketonuria present with decreased pigmentation. Which of the following in the metabolism of phenylalanine is most likely the mechanism causing this?
a. Lack of phenylalanine hydroxylase decreasing tyrosine production.
b. Decreased production of serotonin due to phenylketone inhibition.
c. Increased build up of phenylalanine inhibiting tyrosinase activity.
d. Increased production of phenylketones inhibiting production of gamma-aminobutyric acid.
c
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Which of the following is NOT true regarding the use of fat as an energy source during exercise bouts of equal duration?
A. as exercise intensity increases, the percent of energy derived from fat decreases B. total fat use will be higher at 25% of VO2max than at 85% of VO2max C. fat use during high-intensity exercise improves with endurance training D. total fat use peaks during moderately intense exercise (~65% of VO2max)
A high blood level of the amino acid homocysteine is associated with an increased risk for cardiovascular disease and is considered a measure of poor dietary intakes of vitamin B6, folate, and vitamin B12
Indicate whether the statement is true or false
What percentage of persons with COPD is affected by malnutrition?
A) 20 B) 40 C) 60 D) 80
Which food should you avoid if you wanted to limit sodium in your diet?
a. rice b. almonds c. salad dressing d. chicken e. orange juice