The right and left atria depolarize and contract following the arrival of the action potential from the:
A) Purkinje fibers. B) atrioventricular (AV) node.
C) sinoatrial (SA) node. D) atrioventricular (AV) bundle.
Answer: C
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What does the formula C6H12O6 mean?
A) There are 6 calcium, 12 hydrogen, and 6 oxygen atoms. B) There are 12 hydrogen, 6 carbon, and 6 oxygen atoms. C) The molecular weight is 24. D) The substance is a colloid.
Hassall's corpuscles are always found in the lighter-colored ________ regions of the thymus.
Fill in the blank(s) with the appropriate word(s).
Which structure contains nuclei that regulate body temperature, food intake, and sexual response?
A. Thalamus B. Hypothalamus C. Medulla oblongata D. Pons E. Midbrain
Which of the following lymphatic areas are totally encapsulated with fibrous tissue?
A) palatine tonsil B) Peyer's patches C) cervical node D) pharyngeal tonsil