Which statement comparing action potential and local potential is false?
A. Action potentials are not graded and local potentials are.
B. Action potentials are not reversible and local potentials are.
C. Action potentials are graded and local potentials are not.
D. Action potentials are not decrimental and local potentials are.
Answer: C
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Braxton-Hicks contractions are those that occur
A. during premature labor. B. during false labor. C. during true labor. D. in smooth muscle near the uterus. E. with the most painful intensity.
In general, the nervous system is composed of which two types of cells?
1. motor 2. neurons 3. sensory 4. glial 5. associative A) 2 and 4 B) 1 and 3 C) 3 and 5 D) 1 and 2 E) 3 and 4
Match the cell of adaptive immunity with its function.A. Quick and responsive to antigen, remembers previous exposureB. After activation, differentiates to become plasma cell or memory B cellC. Produces antibodiesD. Destroys cells by lysis or by production of cytokinesE. Activates B and effector T cellsCytotoxic T cell
Fill in the blank(s) with the appropriate word(s).
Which would NOT occur as a result of the blockage of action potential propagation through the bundle of His?
A. There would be a slowing of the frequency of contraction of the ventricles. B. The atria would contract more frequently than the ventricles. C. The SA node would no longer set the pace for atrial contraction. D. The atria and ventricles would no longer beat in synchrony. E. The Purkinje fibers would not receive their typical action potentials from the bundle branches.