What channels are open during the second part of slow depolarization in pacemaker cells?Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer.aVoltage-gated L-type calcium channelbVoltage-gated T-type calcium channelscVoltage-gated potassium channelsdFunny sodium channels

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+

Which of the following is responsible for restoring the ionic conditions of a neuron after depolarization?Question 3Answera.Voltage-gated potassium channelsb.Chemically-gated potassium channelsc.Mechanically-gated potassium channelsd.Voltage-gated sodium channelse.Sodium-potassium pumpClear my choice

The depolarization phase is due to the opening and closing of Blank______ ion channels.Multiple choice question.enzyme-gatedvoltage-gatedligand-gated

What is produced when depolarization of a cell membrane reaches threshold?Multiple ChoiceA new action potential is produced.An existing action potential is stopped.Voltage-gated ion channels close.The absolute refractory period ends.

Which of the following decreases the rate of depolarization in the heart?Question 13Select one:A.norepinephrineB.epinephrineC.acetylcholineD.epinephrine and norepinephrineE.acetylcholine, epinephrine and norepinephrine