The plateau of the action potential in cardiac ventricular cells results from the opening of voltage-gated long-lasting ___________ channels in the plasma membrane of the cell
A. Na+
B. K+
C. Ca2+
D. Cl-
E. glucose
C
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________ are blood vessels that carry blood toward the heart.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements concerning the brain stem is incorrect?
a. the medulla is part of the brain stem. b. the brain stem is a critical connecting link through which all fibers traversing between the periphery and higher brain centers must pass. c. the brain stem controls sociosexual behaviors conducive to mating. d. the brain stem contains the reticular activating system. e. the brain stem contains centers that control respiration, blood vessel and heart function, and digestive activities.
Which of the following contains cell bodies but no synapses?
a. dorsal root ganglia b. anterior grey horns c. chain ganglia d. ciliary ganglia
Which of the following bones is NOT from the axial skeleton?
A. mandible B. sternum C. os coxa D. atlas