Which of the following structures are able to spontaneous generate an action potential?
A. the sinoatrial node (SA Node)
B. the atrioventricular node (AV Node)
C. the atrioventricular bundle
D. the right and left bundle branches
E. All of the items can spontaneously generate an action potential.
Ans: E. All of the items can spontaneously generate an action potential.
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Animals that match their internal osmotic pressures to those of their external environments are called ____
Fill in the blank with the appropriate word.
The genetic map shown in the figure was generated by identifying transferred genes after ____
a. allowing transformation to proceed for varying amounts of time b. allowing conjugation to proceed for varying amounts of time c. bacterial cells were infected by various bacteriophages d. replica plating of E. coli auxotrophs e. allowing transduction to proceed for varying amounts of time
Jaws and paired fins evolved in early __________. Fill in the blank(s) with the appropriate word(s)
All life is made up of complex molecules built on a framework of ________ atoms
Fill in the blank(s) with correct word