During fasting, ketones produced by the liver:
A. are a waste product of amino acid metabolism that the kidneys must excrete.
B. can be used by the brain as an energy source.
C. are a by-product of anaerobic metabolism.
D. are converted to fatty acids and released into the blood.
E. are used to synthesize glucose by gluconeogenesis.
B
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Creatine phosphate functions in the muscle cell by ________
A) forming a temporary chemical compound with myosin B) forming a chemical compound with actin C) storing energy that will be transferred to ADP to resynthesize ATP D) inducing a conformational change in the myofilaments
Which statement is accurate?
A. Human cells contain 46 genes; another name for a gene is a nucleosome. B. DNA is made up entirely of genes; a chromosome is the unwoven form of chromatin. C. A sequence of nucleotides in DNA constitutes a gene; DNA and associated proteins form chromatin. D. Each nucleotide in a gene is bound by hydrogen to the next nucleotide in the sequence; chromatin is a nitrogenous base.
Which statement best describes how the skin works with the nervous system?
A. Neurons stimulate melanocytes to change the pigment of the skin. B. Neurons detect sensations and control glands and arrector pili. C. Neurons detect the presence of bacteria and viruses. D. Neurons control clot formation and inflammation.
The layer of connective tissue that surrounds a fascicle within a peripheral nerve is the
A) perineurium. B) epineurium. C) endoneurium. D) epimysium. E) endosteum.