The matching of blood flow to the changing metabolic needs of a tissue is due to
A) hormonal control.
B) local control.
C) neural control.
B) local control.
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Which valve prevents the backflow of blood into the left ventricle when the ventricles relax?
A. Left atrioventricular valve B. Aortic semilunar valve C. Right atrioventricular valve D. Pulmonary semilunar valve E. None of the choices is correct.
Which tissue attaches skeletal muscles to bones?
A. Tendons B. Adipocytes C. Cartilages D. Ligaments
The figure illustrates changes in the membrane potential during an action potential. What does "B" represent?
A. Threshold B. Afterpotential C. Repolarization D. Local potential E. Depolarization
Which two bones form what is commonly called the cheekbone?
A. Maxilla and mandible B. Vomer and ethmoid C. Nasal and lacrimal D. Zygomatic and temporal