There are more efferent lymphatic vessels leaving a lymph node than there are afferent vessels entering a lymph node
Indicate whether the statement is true or false
FALSE
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What unit of bone consists of a central canal (containing blood vessels, nerves, and lymph vessels) surrounded by concentric rings of calcified matrix?
A. Canaliculus B. Trabeculum C. Lamella D. Osteocyte E. Osteon
The ________nervous system and the hormones of the ________, epinephrine and norepinephrine, decrease glomerular filtration by causing dramatic vasoconstriction of the afferent arterioles.
A. sympathetic; renal cortex B. parasympathetic; adrenal cortex C. sympathetic; adrenal medulla D. parasympathetic; renal medulla
Another name for the parietal pericardium is the
a. epicardium b. endocardium c. myocardium d. parietal pericardium is not known by another name
Which of the following statements regarding contraction of a skeletal muscle fiber is TRUE?
A. Thick filaments shorten when muscle cells contract. B. Some contractions occur without cross-bridge activation. C. Contracting muscle fibers do not always shorten. D. Contraction does not always require the occurrence of an action potential. E. Contraction only occurs following summation of action potentials from many motor neurons.