Which of the following statements about ion channels istrue?
the rate oftransport is slow compared to the rate of transport
via carrierproteins.
they requireatp.
they are openedeither by the binding of ligands or by changes in
electricpotential across the membrane.
they are openmost of the time.
Answers: 3
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Match the following terms describing electrical events with the correct phases of the cardiac cycle. the ventricular muscle cells depolarize at the start of this phase. during this phase, na+ entry through the funny channels causes the pacemaker potential of sa nodal cells to gradually become less negative until it reaches threshold. the ventricular muscle cells repolarize right before this phase. the cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase. a. isovolumetric relaxation b. ventricular ejection c. isovolumetric contraction d. ventricular filling
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What are the doorways into and out of cells, attached to the membrane, and built in the rough er.
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The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions
Answers: 1
Which of the following statements about ion channels istrue?
the rate oftransport is sl...
the rate oftransport is sl...
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