What is an example of mechanical digestion?
Mastication
Absorption
Catabolism
Anabolism
The Correct Answer is A
A. Mastication: Mechanical digestion involves physically breaking down food into smaller pieces, and mastication is a prime example of this.
B. Absorption: This is the process by which nutrients pass from the digestive system into the bloodstream, not a form of mechanical digestion.
C. Catabolism: Catabolism refers to chemical processes that break down molecules within the body, not mechanical digestion.
D. Anabolism: This refers to the synthesis of complex molecules from simpler ones, not related to the physical breakdown of food.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. It is the air in the lungs after maximal inhalation: Total lung capacity (TLC) refers to the total amount of air the lungs can hold after maximum inhalation.
B. It is the quantity of air that a person can move into or out of the lungs: This defines vital capacity, not total lung capacity.
C. It is the amount of air that remains in the lungs after a normal tidal expiration: This describes functional residual capacity, not TLC.
D. It is the maximum volume of air that can be exhaled from the lungs after maximum inhalation: This is the definition of vital capacity (VC), not total lung capacity.
Correct Answer is D
Explanation
A. Producing early induced proteins: While natural killer cells can produce cytokines, their primary function is not related to protein production.
B. Promoting opsonization of bacteria cells: Opsonization is primarily performed by antibodies and complement proteins, rather than natural killer cells.
C. Secreting signaling molecules: While natural killer cells do secrete signaling molecules (cytokines) to communicate with other immune cells, their main role is the direct destruction of infected cells.
D. Destroying virally infected cells: The primary function of natural killer cells is to recognize and eliminate virally infected cells and tumor cells, contributing to the innate immune response.
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