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The process by which bile breaks down large lipid globules into smaller lipid globules in small intestine is called ______

A.

Mastication

B.

Peristalsis

C.

Emulsification

D.

Deglutition

Answer and Explanation

The Correct Answer is C

A. Mastication: Mastication is the mechanical chewing of food that occurs in the mouth to break food into smaller pieces -not related to bile emulsifying fats.
B. Peristalsis: Peristalsis are wave-like smooth muscle contractions that propel contents through the GI tract -helps move chyme but does not chemically/physically disperse fat droplets like bile does.
C. Emulsification: Emulsification is the process by which bile salts surround and break large fat globules into many small droplets, increasing surface area for lipase action.
D. Deglutition: Deglutition is the act of swallowing, moving a bolus from the mouth into the pharynx and esophagus -not the process of bile acting on lipids.


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Related Questions

Correct Answer is B

Explanation

A. Calyx, nephron, collecting duct, urinary bladder, renal pelvis, ureter, urethra: Sequence is wrong -filtrate is formed in nephron, flows into collecting duct, then into calyx → renal pelvis → ureter → bladder → urethra.
B. Nephron, collecting duct, calyx, renal pelvis, ureter, urinary bladder, urethra: Urine forms in nephron → drains into collecting duct → minor/major calyces → renal pelvis → ureter → urinary bladder → urethra for elimination.
C. Nephron, renal pelvis, collecting duct, calyx, urinary bladder, urethra, ureter:Renal pelvis and calyx order is swapped relative to collecting duct; ureter/bladder order is wrong.
D. Collecting duct, nephron, renal pelvis, calyx, urinary bladder, ureter, urethra:Collecting duct follows the nephron (not precedes it); calyx and pelvis ordering is

Correct Answer is D

Explanation

A. Produce surfactant for the alveoli: Surfactant is produced by type II pneumocytes in the alveoli, not by tracheal cartilage.
B. Move mucus towards the alveoli using their cilia: Mucus is moved by ciliated epithelium (mucociliary escalator), not by cartilage rings.
C. Perform external respiration between air and blood: Gas exchange (external respiration) occurs in alveoli, not at the trachea.
D. Allow the trachea to always remain open for passage of air: The C-shaped cartilage rings provide rigid structural support and prevent tracheal collapse while allowing the posterior tracheal wall to flex -this maintains an open airway.

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