Vitamin ____ is necessary for vision, bone growth and maintenance of epithelial cells
a. A
b. K
c. B1
d. B12
a
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________ is an autoimmune condition that leads to the degeneration of myelin sheaths in the CNS.
Fill in the blank(s) with the appropriate word(s).
In type 2 diabetes, insulin levels are frequently normal, yet the target cells are less sensitive to the effects of insulin. This suggests that the target cells
A) may have a defect in their signal transduction pathway. B) are impermeable to insulin. C) have adequate internal supplies of glucose. D) cannot convert insulin to an active form. E) None of these answers are correct.
Select the incorrect statement about the action potential
a. It has an all-or-none characteristic b. It has a refractory period c. It is triggered by depolarization to threshold d. It occurs along a plasma membrane e. It speeds up transmission by summation
The glands that produce a lipid-rich lubricant that prevents the eyelids from sticking together are called ________.
Fill in the blank(s) with the appropriate word(s).