Blood ferritin levels are specifically reflective of
A. iron transport in the blood.
B. the rate of iron absorption in the intestine.
C. the ability of iron to be incorporated into proteins.
D. the amount of iron stored in the body.
Q. 2Comparing dietary heme iron to non-heme iron, the following statement is true:
A. Non-heme iron is more readily absorbed than heme iron.
B. Non-heme iron is found primarily in animal products while heme iron is found primarily in plant-based foods.
C. Vitamin C enhances heme iron absorption but has no effect on non-heme iron absorption.
D. Non-heme iron is found primarily in plant-based foods while heme iron is found primarily in animal products.
Q. 3In some people, increasing salt intake is associated with _____ because the high-salt diet induces _____ blood volume.
A. hypotension, decreased
B. hyponatremia, increased
C. hypertension, increased
D. hypertension, decreased
Q. 4An athlete is most at risk for hyponatremia if
A. he or she sweats excessively and drinks excessive amounts of water.
B. he or she sweats excessively and drinks sports drinks containing glucose and sodium.
C. he or she consumes a diet adequate in sodium and competes in events lasting 1 minute or less.
Q. 5Stimulation that results in an influx of sodium ions into a cell coupled with the movement of potassium ions out of the cell explains the role of electrolytes in
A. muscle contraction.
B. nerve impulse transmission.
C. osmosis.
D. muscle relaxation.
Q. 6Along with dietary and genetic factors, certain lifestyle factors increase the risk of osteoporosis. These include all of the following except:
A. smoking.
B. chronic alcohol consumption.
C. weight-bearing exercise.
D. the use of certain medications that can negatively impact bone health.
Q. 7Aging in women results in a gradual loss of bone mass for several reasons, including
A. poor vitamin D production.
B. poor calcium absorption.
C. increased estrogen production.
D. All of the above
E. A and B
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