In the normal heart, the ________ has the highest rate of discharge and sets the rate of depolarization for the heart as a whole
A) SA node B) AV node C) bundle branches D) AV bundle
Answer: A
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Which cells would you expect to increase in number during an infection of the CNS?
A. Oligodendrocytes B. Astrocytes C. Microglia D. Ependymal cells E. Schwann cells
What type of epithelial junction contains connexons?
A. Desmosome B. Adhering junction C. Flat junction D. Gap junction E. Tight junction
If an increase in blood temperature were detected, one would probably observe
A. increased sweat production. B. vasoconstriction of peripheral blood vessels. C. increased muscular activity. D. shivering. E. decreased sweat production.
During a long illness, Terrell has not been eating much. As a result, his plasma Ca2+ levels decrease. Which hormone would we expect to see in higher levels than usual in his blood?
A. Parathyroid hormone B. Calcitonin C. Insulin D. Thyroxine E. Growth hormone