Which of the following is not occurring at the same time when the QRS complex appears on an ECG?
a. depolarization of Purkinje fibers
b. depolarization of the ventricles
c. repolarization of the atria
d. depolarization of internodal pathways
e. All of the above are occurring at the same time
D
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Which of the following developmental periods is the longest?
a. embryo stage b. fetus stage c. neonatal stage d. infancy stage
Answer the following questions true (T) or false (F)
1. The epiphyseal plate is a layer of compact bone from which longitudinal growth occurs. 2. All bone growth completely stops by the end of adolescence. 3. Bone deposition exceeds bone resorption when bones are stressed through compression or tension.
Sam is curling very heavy weights and suddenly drops them. Which reflex forced this action by Sam to prevent tendon damage?
A. muscle spindle reflex B. Golgi tendon reflex C. gamma motor reflex D. withdrawal reflex E. alpha motor neuron reflex
A patient has been diagnosed with mild heart disease. Tests show that some of the coronary arteries are partially occluded. Which of the following is the best course of action to treat the disease?
A. Angioplasty B. Coronary bypass surgery C. Electrocardiogram D. Tissue plasminogen activation E. Angiogram