The nucleolus functions in the synthesis of RNA which becomes part of the ribosomes.
a. true
b. false
Ans: a. true
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The secretion of the hormone insulin in response to changes in blood glucose level is an example of a(n) ________ reflex.
Fill in the blank(s) with the appropriate word(s).
The only nerve of the brachial plexus that forms without the mixing of nerve trunks is the ________ nerve.
A) suprascapular B) long thoracic C) subclavius D) dorsal scapular E) subscapular
Which of the following factors of the internal environment is not homeostatically maintained?
a. its concentration of nutrient molecules. b. its concentration of nitrogen gas, of which 80% of the atmospheric air is composed. c. its concentration of oxygen and carbon dioxide. d. its pH. e. its temperature.
Exocrine glands do not
a. release their products into ducts b. empty into a surface or cavity c. stimulate receptors in target cells d. all of the above are characteristics of exocrine glands