The respiratory membrane is composed of fused basement membrane of the capillary walls and
Type I pneumocytes
Respiratory bronchioles
Segmental (tertiary) bronchi
Type II pneumocytes
The Correct Answer is A
A. Type I pneumocytes: The respiratory membrane is formed by alveolar Type I (squamous) pneumocytes, their basement membrane fused with the capillary basement membrane, and capillary endothelial cells -allowing efficient gas diffusion.
B. Respiratory bronchioles: Respiratory bronchioles are airway structures leading to alveoli but are not the cellular layer that composes the thin respiratory membrane.
C. Segmental (tertiary) bronchi: These are larger conducting airways far upstream from the alveolar gas-exchange surface.
D. Type II pneumocytes: Type II cells produce surfactant and are present in alveoli, but the thin gas-exchange surface is primarily Type I pneumocytes (Type II are cuboidal and thicker).
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Gallbladder:The gallbladder stores and concentrates bile and does not perform mechanical breakdown of food -not a mechanical breakdown structure.
B. Tongue:The tongue manipulates and positions food for chewing and helps form the bolus (mechanical processing) -contributes to mechanical breakdown (correct).
C. Teeth:Teeth chew and physically break food into smaller pieces (mastication), which is the primary start of mechanical digestion -directly responsible for mechanical breakdown (correct).
D. Stomach:The stomach performs mechanical churning and mixing of food (mechanical digestion) but it is not the beginning of mechanical breakdown -chewing in the mouth begins it.
Correct Answer is ["D","F"]
Explanation
A. Glomerulus – 6:The glomerulus is the capillary tuft labeled 2, not 6.
B. PCT – 9:The proximal convoluted tubule is labeled 7(first coiled segment after the capsule); there is no 9 shown.
C. Distal convoluted tubule – 8:The DCT is labeled 6(coiled segment after the ascending limb). 8points to the collecting system.
D. Nephron loop – 3, 4 and 5:3= descending limb, 4= hairpin turn, 5= ascending limb.
E. DCT – 9:DCT is 6; no 9 indicated.
F. Glomerular capsule – 1:The capsule (Bowman’s capsule) encasing the glomerulus is labeled 1.
G. Collecting duct – 1:The collecting duct is the long vertical duct on the right (labeled 7/8), not 1.
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