Question 5 (1 point) The plasma membrane Ca2+ channel in contractile cardiomyocy

Question

Question 5 (1 point) The plasma membrane Ca2+ channel in contractile cardiomyocytes is NOT used for this. O prolonging membrane depolarization O prevents cardiac tetanus O starting membrane depolarization 0 leads to Ca2+ release from the sarcoplasmic reticulum Save Question 6 (1 point) Atrial repolarization occurs during which ECG interval? O P-R O QRS O S-T Save Question 7 (1 point) to start muscle contraction Cardiac muscle, unlike skeletal muscle, makes use of O voltage-gated Na channels O sarcomeres O Ca influx across the plasma membrane O neuronal innervation Save 1048 A

Explanation / Answer

Question 5: Starting membrane depolarization.

Question 6: QRS complex

Question 7: Voltage gated sodium channels

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