What changes occur as the respiratory tract branches into smaller and smaller tubes?
Their epithelial lining changes to connective tissue.
Their epithelial lining becomes thinner.
They have relatively thicker epithelial lining.
They have relatively more cartilage.
The Correct Answer is B
A. Their epithelial lining changes to connective tissue. -The lining transitions from pseudostratified ciliated columnar to cuboidal to simple squamous, but never connective tissue.
B. Their epithelial lining becomes thinner. -This thinning allows efficient gas exchange at the alveolar level.
C. They have relatively thicker epithelial lining. -The epithelium actually becomes progressively thinner.
D. They have relatively more cartilage. -Cartilage decreases as bronchi branch into bronchioles, disappearing entirely in terminal bronchioles.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is {"dropdown-group-1":"B","dropdown-group-2":"B"}
Explanation
A. lipase; lipids: lingual lipase (from tongue) begins lipid digestion, but major salivary secretion is amylase, not lipase.
B. amylase; carbohydrates: salivary (ptyalin) amylase begins digestion of starches (carbohydrates) into smaller sugars.
C. pepsin; proteins: pepsin is secreted as pepsinogen by the stomach, not salivary glands.
D. sucrase; sucrose: sucrase is a brush-border (intestinal) enzyme, not a major salivary gland secretion.
Correct Answer is {"dropdown-group-1":"C"}
Explanation
Correct answer: Right atrium
The arrow indicates the right atrium— the chamber that receives systemic venous return via the superior and inferior venae cavae.
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