ACh has an inhibitory effect on the pacemaker cells of the heart because its binding causes an outward diffusion of which of the following ions?Multiple choice question.Ca2+Na+K+Cl-

The level of which of the following ions increases after fusion of the egg and sperm plasma membranes?Multiple choice question.K+Cl-Na+Ca2+

Which of the following does not contribute to the pacemaker activity of the cardiacmuscleA.K+· t C 2+B. Trans1en al . C 2+C. Longer astmg aD. Fast Na+E. None of the above

Select all that applyWhich are the predominant ions carried in plasma?Multiple select question.Cl-Na+KHCO3-Ca2+

The pacemaker potential results from the opening of ____ channels in the plasma membrane of the ____ cell, leading to ____ influx.Group of answer choicesFunny; autorhythmic; K+Ca2+; contractile; Ca2+Funny; autorhythmic, Na+Funny; contractile; Na+

3. Which of the following has the largest ionic radius?Ca2+K+Cl-Ar