Which statement correctly describes vitamin A?
A. Nearly all cells have vitamin-A binding retinoid receptors.
B. Vitamin A is carried from the liver by retinol-binding protein and transthyretin in the blood.
C. Within a cell, vitamin A is involved in gene expression and cell differentiation.
D. All of the choices are correct.
Answer: D
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_______________ is the ion that moves in the opposite direction of HCO3-.
Fill in the blank(s) with the appropriate word(s).
Within a day of beginning a fast, most of the body's stores of _____ are depleted.
a. glycogen
b. amino acids
c. fatty acids
d. glycerol
The primary electrolytes in sports drinks are sodium and phosphorus.
Answer the following statement true (T) or false (F)
What causes kwashiorkor to develop in some children with protein-calorie malnutrition?
a. an infection b. genetic traits triggered by low protein intake c. an inability to utilize protein and fat normally during starvation d. an allergic reaction to certain essential amino acids e. a parasite found in water