Which process involves gas exchange between the atmosphere and the cells of the body and the resulting chemical reactions that provide the cells with energy to function.
respiration
oxidation
metabolism
breathing
The Correct Answer is A
A. Respiration: Respiration encompasses gas exchange (external/internal) and cellular reactions (cellular respiration) that produce energy
B. Oxidation: Oxidation is a chemical process involved in metabolism but does not by itself describe the full gas-exchange-energy sequence
C. Metabolism: Metabolism is the sum of biochemical reactions (including energy production) but doesn’t explicitly include atmospheric gas exchange -less precise / incorrect for the combined description.
D. Breathing: Breathing (ventilation) is the mechanical movement of air and does not include cellular chemical reactions that generate cellular energy
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Pepsin: pepsin is a stomach protease that digests proteins, not starch.
B. Mucus: mucus lubricates and protects tissues but does not chemically digest starch.
C. Salivary amylase: salivary amylase (ptyalin) begins starch digestion in the mouth, producing maltose/oligosaccharides that taste sweet.
D. Bicarbonate ions: bicarbonate neutralizes acid but does not break down starch.
Correct Answer is A
Explanation
A. QRS complex: The QRS represents the rapid depolarization of the right and left ventricles (electrical activity that triggers ventricular contraction).
B. T wave: The T wave represents ventricular repolarization (the ventricles recovering electrically), not depolarization.
C. P wave: The P wave represents atrial depolarization, the electrical activation of the atria.
D. PQ segment: The PQ (PR) segment is the brief isoelectric period while the impulse travels through the AV node/AV bundle (a conduction delay), not ventricular depolarization.
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