________ is the messenger that regulates blood pressure by causing arterial smooth muscle relaxation
Fill in the blank with correct word.
Answer: Nitric oxide
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The half-life of carbon-14 is 5730 years. Approximately how old is a fossil that contains .25g carbon-14 and .75g nitrogen-14?
A. 11,460 years B. 5730 years C. 17,190 years D. 22,920 years E. 28650 years
The two principal divisions of the peripheral nervous system are the
a. somatic and autonomic systems. b. sympathetic and parasympathetic systems. c. peripheral and central systems. d. afferent and autonomic systems. e. cranial and skeletal nerves.
The Rb gene is located at 13q14. This locus is on
A. the long arm of chromosome 14 B. the long arm of chromosome 13 C. the short arm of chromosome 14 D. the short arm of chromosome 13
Mitochondria contain their own DNA, separate from that of the rest of the cell
Indicate whether the statement is true or false