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Physiology › ViewThe number of action potentials per minute each type of autorhythmic cell can generate under resting conditions is as follows:
A. the rate for the SA node is 70-80, for the AV node is 40-60 and for the Bundle of His and Purkinje fiber is 20-40
B. the rate for the SA node is 70-80, for the AV node is 70-80 and for the Bundle of His and Purkinje fiber is 40-60
C. the rate for the SA node is 70-80, for the AV node is 20-40 and for the Bundle of His and Purkinje fiber is 40-60
D. the rate for the SA node is 40-60, for the AV node is 70-80 and for the Bundle of His and Purkinje fiber is 40-60
E. the rate for the SA node is 40-60, for the AV node is 70-80 and for the Bundle of His and Purkinje fiber is 20-40
Skin Structure › View
The layer that is composed of several of different shaped cells and contains skin pigment is called
A. stratum corneum
B. stratum lucidum
C. stratum granulosum
D. stratum basile