A substance does not move down a concentration gradient through
a. a symporter
b. an antiporter
c. a primary active transporter
d. a secondary active transporter
e. facilitated diffusion carrier
C
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Which of the following is not a step in endochondral bone formation?
A. Hyaline cartilage develops into the shape of the future bone. B. Hyaline cartilage changes to adipose tissue. C. Osteoblasts deposit osseous tissue in place of disintegrating cartilage. D. Periosteum forms from connective tissue outside the developing bone.
Thyroid hormone is somewhat unique in that it is a
A. protein hormone that is water-soluble. B. monoamine that is water-soluble. C. steroid hormone that is lipid-soluble. D. steroid hormone that is water-soluble. E. biogenic amine that is lipid-soluble.
What is the function of the Myelin?
A. Protect the axon B. Electrically insulate fibers from one another C. Increase the speed of nerve impulse transmission D. All of the above
Excess amino acids in the body are
a) Excreted in urine b) Excreted in feces c) Converted into glucose d) Stored as ATP e) Converted into proteins