91.What the optimal fluoride concentration in community water supplies?
a.1 ppm
b.2 : 1401686.
91.What is the optimal fluoride concentration in community water supplies?
a.1 ppm
b.2 ppm
c.2.5 ppm
d.4 ppm
92.Which of the following is known to cause discoloured enamel of the teeth?
a.excessive fluoride in the water
b.insufficient fluoride in the water
c.excessive intake of simple sugars
d.inability of the body to absorb fluoride
93.Which of the following properties do vitamins D and K share?
a.Both are synthesized in the body.
b.Both are required for normal vision.
c.Neither has an effect on bone metabolism.
d.Neither has an effect on erythrocyte function.
94.What is the Adequate Intake for men for vitamin K?
a.40 µg/day
b.60 µg/day
c.90 µg/day
d.120 µg/day
95.Once vitamin K is synthesized, where is it stored in the body?
a.the kidneys
b.the heart
c.the liver
d.the bones
96.What is the primary function of vitamin K?
a.blood clotting
b.energy metabolism
c.calcium utilization
d.epithelial tissue renewal
97.Approximately what percentage of vitamin K is made by bacteria in the GI tract?
a.30 percent
b.40 percent
c.50 percent
d.60 percent
98.Which of the following is a vitamin K-rich food?
a.milk
b.fortified breakfast cereals
c.cabbage
d.orange juice
99.Which of the following is a function of osteocalcin?
a.It activates lysosomes involved in remodelling bone.
b.It binds calcium in the GI tract to enhance absorption.
c.It requires vitamin K to bind to bone-forming minerals.
d.It works synergistically with the kidneys to reduce urinary calcium excretion.
100.Although rare, which of the following indicates a vitamin K deficiency?
a.dermatitis
b.hemorrhage
c.muscle weakness
d.bone pain
91.What the optimal fluoride concentration in community water supplies?
a.1 ppm
b.2 : 1401686
