The "QRS" complex visible in a normal electrocardiogram is associated with the
A. excitation from the AV node and depolarization of the ventricles.
B. excitation from the SA node and depolarization of the atria.
C. excitation from the SA node and repolarization of the ventricles.
D. excitation from the AV node and repolarization of the atria.
E. activity in the vagus nerve and release of acetylcholine.
A. excitation from the AV node and depolarization of the ventricles.
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Chromosomes other than those involved in sex
determination are known as a. nucleosomes. b. hematosomes. c. alleles. d. autosomes. e. liposomes.
Since quantitative traits can be described by a plot of the frequency vs value of the trait since
A. the trait can have a range of values B. the traits are discrete. C. the traits are discontinuous D. the traits are frequently the result of a single gene with more than two alleles.
Over 90% of the worldwide deaths from malaria in 2011 occurred in:
a. Africa b. India c. Mexico d. Southeast Asia e. South America
The knee is an example of a ____
a. cartilaginous joint b. ligament c. meniscus d. synovial joint e. fibrous joint