The _____ phase of the action potential in _____ cells is due to a _____
a. rising, autorhythmic cells, rapid Ca2+ influx
b. rising, contractile cells, rapid Na+ influx
c. plateau, contractile cells, slow Ca2+ influx
d. All of the above correctly complete the sentence.
e. Only b and c correctly complete the sentence.
D
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In an autonomic motor pathway, the first cell in the two-neuron chain is the ______ neuron
A. preganglionic B. postganglionic C. posterior D. terminal E. primary
Which of the following cartilaginous joints is found only in young, growing people?
A) pubic symphysis B) intervertebral disc C) epiphyseal plate D) costochondral joint
What does not happen to a carbon dioxide molecule once it enters the bloodstream?
A) It is converted to a molecule of carbonic acid. B) It binds to the protein portion of hemoglobin molecules within red blood cells. C) It dissolves in plasma. D) It is converted by carbonic anhydrase. E) It binds to heme groups in hemoglobin.
The hand is made up of _____ regions.
Fill in the blank(s) with the appropriate word(s).