If the SA node of a patient ceases to produce pacemaker activity: Select one. a. heart rate will remain at normal levels b. heart rate will increase above normal levels C. the AV node will usually become the pacemaker for the heart d. 3rd degree (complete) heart block (failure of AV nodal conduction) is inevitable e. the patient will immediately die

Which statement about relative potential energy of electrons is correct? a. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 2 s orbital of the second electron shell. b. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 3 p orbital of the third electron shell. c. an electron in the 3 p orbital of the third electron shell has more potential energy than an electron in the 2 p orbital of the second electron shell.