The spontaneous opening of Na+ channels marks the beginning of ________ of a cardiac muscle cell.
A. depolarization
B. repolarization
C. hyperpolarization
D. afterpolarization
E. isopolarization
Answer: A
You might also like to view...
Straightening the leg at the knee is an example of a type of movement called ________.
Fill in the blank(s) with the appropriate word(s).
Which of the following waves of an ECG pattern is/are correctly described?
A. QRS complex-repolarization of ventricles B. T wave-depolarization of ventricles C. QRST complex-depolarization of ventricles D. P wave-depolarization of atria
Cerebrospinal fluid formed in the lateral ventricles travels through the ________ to reach the third ventricle.
A. median aperture B. central canal C. cerebral aqueduct D. interventricular foramen
Which of the following is NOT true of colorblindness?
A. Protanopia involves a lack of or a decrease in sensitivity to the blue-sensitive cones. B. Deuteranopia involves a lack of or a decreased sensitivity to green-sensitive cones. C. Males and females can be colorblind, but the condition is more common in males. D. It is a hereditary trait carried on the X chromosome. E. All of these are true of colorblindness.