Cells within an epithelium are held together by special connections called junctions. Which junction provides a direct passageway for small molecules to pass from one cell to another?

A. Glial junctions
B. Tight junctions
C. Adhering junctions
D. Gap junctions
E. Desmosomes


Answer: D

Anatomy & Physiology

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In ECG tracings, extension of the P-R interval to more than 200 msec most likely can indicate which of the following?

A) coronary ischemia or myocardial damage B) congenital heart defect C) electrolyte disturbances D) damage to the conducting pathways E) inadequate blood supply to the heart

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In the first pregnancy of an Rh-negative mother with an Rh-positive child, why are there usually NO symptoms of erythroblastosis fetalis?

a. antibodies from the mother's blood cannot cross over to the child b. the immune system of first child develops faster than that of the second or later children c. blood between mother and child does not mix until birth d. none of the listed responses are correct

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The most dangerous type of skin cancer is basal cell carcinoma

Indicate whether the statement is true or false.

Anatomy & Physiology