What you can visually see during the QRS complex in an electrocardiogram best represents:
a. depolarization of the atria
b. repolarization of the atria
c. depolarization of the ventricles
d. repolarization of the ventricles
e. the delay at the AV node
Answer: c. depolarization of the ventricles
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Active transport
A. requires ATP. B. does not require metabolic energy (ATP). C. can move substances along their concentration gradient. D. involves vesicle formation. E. follows osmotic pressure gradients.
Which of the following is true regarding the nervous and endocrine systems?
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The action of the vastus medialis is to
a. extend the knee b. flex the knee c. medially rotate the knee