Which of the following categories of epithelium is based on cell shape?
A. Simple
B. Stratified
C. Transitional
D. Columnar
E. Keratinized
Answer: D
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Purkinje fibers are small fibers within the atria that conduct impulses rapidly
Indicate whether this statement is true or false.
The muscle that produces the action of standing on tip-toes is the
A) peroneus. B) extensor digitorum. C) soleus. D) plantaris. E) tibialis anterior.
Define respiratory rate
A) Respiratory rate is the amount of air that remains in your lungs even after a maximal exhalation. B) Respiratory rate is the time it takes to voluntarily expel all of your air. C) Respiratory rate is the time it takes to inhale forcibly all of your air. D) Respiratory rate is the number of breaths taken each minute. E) Respiratory rate is volume of air moved each minute.
The function of a tight junction within epithelial tissue is to
A. assure that material is captured by phagocytes before entering a cell. B. assure that material is channeled between cells rather than into them. C. prevent the dissolution of a cell's plasma membrane. D. assure that material has to pass through rather than between epithelial cells. E. channel substances away from an epithelium rather than toward it.