Which of the following constitutes the principal venous drainage of the thoracic organs?
A. The branches of the celiac trunk
B. The azygos system
C. The mesenteric circulation
D. The hepatic portal system
E. The coronary and pulmonary veins
B. The azygos system
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This is the most common tissue and is found throughout the body more than any other form
A) Epithelial B) Connective C) Muscle D) Nervous
The peripheral nervous system includes the
A) somatic nervous system. B) brain. C) spinal cord. D) nuclei. E) all of the above.
In some proteins, an ionic bond may form between an amino acid with
A. a glycine and another with a tryptophan. B. a carboxyl group and an amino acid with a C-terminal. C. a positive R group and an amino acid with a negative R group. D. a negative R group and a nonpolar amino acid. E. a sulfhydryl group and an amino acid with an amine group.
John is a sprinter who specializes in quick and powerful bursts of speed followed by periods of rest. Jim is a marathon runner who specializes in long, steady runs. Compared to Jim, John is likely to have:
A. legs with a larger diameter. B. legs with a smaller diameter. C. hypertrophy of type I muscle fibers. D. a higher density of capillaries in his legs. E. lower concentrations of glycolytic enzymes in his leg muscles.