Of the types of damage resulting from a myocardial infarction, which is most likely to cause the greatest increase in the Q-T interval?
A. Infarction affecting the SA node
B. Tachycardia
C. Ectopic focus
D. Left bundle branch block
E. Infarction in the AV node
Answer: D
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Most of the gyri and sulci of the human brain develop very early in the fetal period.
Answer the following statement true (T) or false (F)
The depolarization of the pacemaker action potential spreads to adjacent cells through
A) desmosomes. B) chemical synapses. C) gap junctions. D) tight junctions.
The trachea
A. bifurcates to form the bronchioles. B. is located in the pleural cavity. C. has "C" shaped cartilages that form its anterior and lateral sides. D. collapses when not in use. E. is lined with keratinized squamous epithelium.
Which mechanism is important in the reabsorption of glucose and amino acids when their concentrations in the filtrate are relatively high?
A. pinocytosis B. active transport C. facilitated transport D. countertransport