Which type of intercellular connection facilitates the passage of electrical signals between cardiocytes and enables a coordinated heart beat?
A. Tuxedo junctions
B. Gap junctions
C. Tight junctions
D. Desmosomes
E. J junctions
Answer: B
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Which of the following groups of elements accounts for more than 95% of the human body by weight?
A. Calcium, hydrogen, oxygen, nitrogen B. Carbon, hydrogen, oxygen, nitrogen C. Carbon, phosphorus, oxygen, hydrogen D. Calcium, phosphorus, hydrogen, nitrogen
Taste buds on the tongue are often associated with epithelial projections called
A) macula. B) lingual papillae. C) ganglion cells. D) pharyngeal papillae. E) ampulla.
Once they have developed surface receptors for a particular antigen, lymphocytes are said to be what?
A. Capped B. Self-tolerant C. Sensitized D. Immunoefficient E. Immunocompetent
Differences between a young child's skeleton and that of a small adult include which of the following?
A) There is a large mastoid process in the child skeleton. B) The external auditory meatus is larger in the child. C) In the child's skeleton a frontal suture is present. D) The child skeleton has full dentition. E) All of the answers are correct.