Vitamin A deficiency causes abnormal cell differentiation and results in:
a. beriberi.
b. pellagra.
c. keratinization.
d. kwashiorkor.
Question 2
Liver stores of vitamin A are usually sufficient to last approximately:
a. 1 week.
b. 3 to 5 weeks.
c. 6 to 12 months.
d. 1 to 2 years.