Which of the following statements provides inaccurate information?
A) In paracrine communication, the target cell receives chemical messenger from signal cell via diffusion.
B) A neurotransmitter is a chemical messenger that has been converted from an electrical signal.
C) Endocrine messengers are hormones.
D) Allelochemicals are chemical messengers released into the external environment by individuals of the opposite sex but of the same species.
Answer: D
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The term lordosis refers to
A. the anterior convexity in the lumbar region that a child develops when he or she walks upright B. an exaggeration of the secondary curvature that develops in the lumbar region C. a and b D. Neither a nor b
Superior phrenic arteries supply the ________ and emerge from the ________.
A. pancreas; descending abdominal aorta B. diaphragm; descending thoracic aorta C. diaphragm; descending abdominal aorta D. esophagus; descending thoracic aorta E. stomach; descending abdominal aorta
Blood is drained from the liver by the
A) inferior vena cava. B) celiac trunk. C) hepatic vein. D) hepatic portal vein. E) both the hepatic vein and the hepatic portal vein.
Cell bodies of these neurons lie in ganglia in the peripheral nervous system (PNS)
A) sensory neurons B) motor neurons C) interneurons