The capillaries and lymphatics that transport nutrients absorbed across the wall of the GI organs lie in the
Muscularis
Mucosal epithelium
Serosa
Lamina propria
The Correct Answer is D
A. Muscularis: The muscularis is the smooth muscle layer responsible for peristalsis/segmentation; it contains muscle, not the primary capillary/lymphatic beds for nutrient absorption.
B. Mucosal epithelium: The epithelial layer faces the lumen and absorbs nutrients at the cell surface, but the transport capillaries/lymphatics lie deeper than the epithelium.
C. Serosa: The serosa is the outer connective tissue covering of the gut -it does not contain the nutrient capillaries and lacteals.
D. Lamina propria: The lamina propria (a connective tissue layer within the mucosa) contains blood capillaries and lymphatic lacteals that transport absorbed nutrients.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. It depends on the complete lack of surface tension on the alveolar wall:Alveoli have surface tension; pulmonary surfactant reduces surface tension but does not eliminate it. Quiet expiration does not require an absence of surface tension.
B. It is driven by increased blood CO₂ levels:Elevated CO₂ increases the drive to breathe (affects ventilation rate), but quiet expiration itself is notactively driven by CO₂ -it is passive.
C. It is a passive process that depends on the relaxation of inspiratory muscles:Quiet expiration occurs when the diaphragm and external intercostals relax and elastic recoil of the lungs and chest wall returns air to atmosphere.
D. It requires contraction of abdominal wall muscles:Abdominal muscle contraction is used for forced expiration (e.g., coughing or heavy exercise), not normal quiet expiration.
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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