The interphalangeal joints are what type joints?
A. hinge
B. condyloid
C. saddle
D. none of the above
A. hinge
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During blood vessel development, the ________ veins form the hemiazygos and azygos system of veins.
A. umbilical B. supracardinal C. subcardinal D. vitelline E. anterior cardinal
Which of the following carries oxygen-poor blood to the lungs from the heart?
A. The great cardiac vein B. The superior vena cava C. The pulmonary arteries D. The pulmonary veins E. The coronary sinus
The AV node
a. is the normal pacemaker of the heart. b. is the only electrical connection between the atria and the ventricles. c. rapidly conducts the impulse from the atria to the ventricles so that they contract simultaneously. d. is not innervated by the vagus. e. has the fastest rate of depolarization in the heart.
An increase in blood pressure would:
A. stimulate parasympathetic input to the piloerector muscles of the skin B. inhibit parasympathetic input to the piloerector muscles of the skin C. stimulate parasympathetic input to the heart D. stimulate sympathetic input to arterioles in the skin and muscle E. stimulate sympathetic input to the veins