Mechanical breakdown of food begins with: (Select all that apply)
Gallbladder
Tongue
Teeth
Stomach
The Correct Answer is B
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Pancreas:Most of the pancreas (head, neck, body) lies retroperitoneal (except the tail which may be intraperitoneal).
B. Stomach:The stomach is intraperitoneal (suspended by mesenteries).
C. Liver:The liver is intraperitoneal (covered by visceral peritoneum except at bare area).
D. Spleen:The spleen is intraperitoneal and suspended by ligaments (not retroperitoneal).
Correct Answer is A
Explanation
A. Nasal cavity, pharynx, larynx, trachea, bronchi, bronchioles, alveoli: This correctly lists the anatomical pathway air follows from entry to the gas-exchange sites.
B. Nasal cavity, pharynx, trachea, larynx, bronchi, bronchioles, alveoli: This places the trachea before the larynx (incorrect order); the larynx is between the pharynx and trachea.
C. Nasal cavity, pharynx, larynx, trachea, bronchioles, bronchi, alveoli: This incorrectly reverses bronchioles and bronchi -bronchi branch into bronchioles, not the other way around.
D. Nasal cavity, larynx, pharynx, trachea, bronchi, bronchioles, alveoli: This places the larynx before the pharynx (incorrect); air passes through the pharynx first then the larynx.
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