The ascending and descending tracts of the spinal cord are part of the
A. white matter.
B. gray matter.
C. both gray matter and white matter.
Answer: A
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Which protein joins together the Okazaki fragments of DNA in the lagging strand?
A)the replication fork B)RNA C)DNA polymerase D)the leading strand E)DNA ligase
Which three components make up the porta hepatis
A) hepatic portal vein, hepatic artery proper, common bile duct B) central vein, hepatic vein, common bile duct C) hepatic portal vein, hepatic artery proper, hepatic vein D) hepatic artery proper, central vein, common bile duct E) hepatic portal vein, central vein, hepatic artery proper
Which of the following statements concerning the parasympathetic division of the autonomic nervous system is false?
A) Preganglionic neurons are located in the brain stem and sacral region of the spinal cord. B) Ganglionic neurons are located in ganglia within or near to effectors. C) Preganglionic fibers are relatively short and postganglionic fibers are relatively long. D) The actions of the parasympathetic division are more localized than those of the sympathetic division. E) The ganglionic neurons always release acetylcholine.
A fatty acid that contains only single covalent bonds in its carbon chain is said to be
A) saturated. B) polyunsaturated. C) monounsaturated. D) hydrogenated. E) carboxylated.