Which of the following is the main component of fiber in our diet?
A. Starch
B. Glycogen
C. Protein
D. Cellulose
Answer: D
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At very low concentrations, epinephrine causes an artery to dilate. At higher concentrations epinephrine causes the same artery to constrict. How can these different effects be explained?
A. There are two types of receptors for epinephrine that use the same second-messenger system. B. There are two types of epinephrine receptors with different affinities for epinephrine that use two different second-messenger systems. C. There is one type of epinephrine receptor that uses two second-messenger systems. D. At higher concentrations epinephrine can pass through the plasma membrane and directly stimulate contraction within the cell.
Which of the following is not an endocrine gland?
A. Salivary gland B. Testis C. Pineal gland D. Hypothalamus
The mitochondria of __________ fat contain a unique uncoupling protein called __________
Fill in the blank(s) with correct word
The sodium-potassium pump moves the ions in which direction?
What will be an ideal response?