Which of the following statements about the duodenum is not true?
A. It is longer than the jejunum.
B. It receives bile from the liver.
C. It receives chyme from the stomach.
D. It contains a brush border.
E. It receives secretions from the pancreas.
A. It is longer than the jejunum.
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Which path of arteries would a blood cell follow on its way from the thigh to the foot?
A. Deep femoral a., medial planar a., posterior tibial a., plantar arterial arch B. Femoral a., popliteal a., anterior tibial a., dorsalis pedis a. C. Internal iliac a., deep femoral a., poplitial a., posterior fibular a. D. Lateral sacral a., femoral a., hamstring a., tibial a., dorsalis pedis a. E. Femoral a., saphenous a., azygous a., anterior tibial a.
Which of the following is a monosynaptic reflex?
a. stretch reflex b. withdrawal reflex c. crossed-extensor reflexes d. All of the above e. Only c and d
In mitosis, which of the following phases is known as the resting stage??
A) ?Interphase B) ?Prophase C) ?Metaphase D) ?Anaphase E) ?Telophase
The term "codon" refers to
A. an amino acid that is coded for by three bases of DNA. B. a three-nucleotide sequence of DNA that codes for a protein. C. a three-base sequence of mRNA. D. the part of tRNA that is a triplet of bases that forms hydrogen bonds with complementary sequences. E. the part of a rRNA molecule where a new amino acid is added.