What is NOT a function of the nose?
Producing digestive enzymes
Housing olfactory receptors
Filtering and cleaning air
Resonating speech sounds
The Correct Answer is A
A. Producing digestive enzymes: The nasal cavity does not have any role in enzyme secretion for digestion. Digestive enzymes are produced primarily by the salivary glands, stomach, pancreas, and small intestine to facilitate chemical breakdown of food. The nose is part of the respiratory and olfactory systems, not the gastrointestinal system.
B. Housing olfactory receptors: The superior portion of the nasal cavity contains the olfactory epithelium, which houses specialized chemoreceptors responsible for the sense of smell. These receptors transmit impulses via the olfactory nerve (cranial nerve I) to the olfactory bulb and cortex, enabling odor detection and discrimination.
C. Filtering and cleaning air: The nasal cavity plays a critical role in air filtration through vibrissae (nasal hairs), mucus secretion, and ciliated epithelium. These mechanisms trap particulate matter, pathogens, and debris, while coordinated ciliary movement propels contaminants toward the pharynx for elimination.
D. Resonating speech sounds: The nasal cavity contributes to speech by serving as a resonating chamber that modifies sound produced by the larynx. Proper nasal resonance is essential for phonation of certain consonants and overall voice quality; obstruction can result in hyponasal or hypernasal speech patterns.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. V=KT: This is a simplified form of Charles’s Law, showing that volume is directly proportional to temperature, but it lacks the comparative ratio format used to calculate changes between two states. It is more conceptual than practical for solving problems.
B. V1/T1=V2/T2: This is the correct equation representing Charles’s Law, which states that the volume of a gas is directly proportional to its absolute temperature (in Kelvin) when pressure is constant. It allows calculation of volume changes as temperature changes while holding pressure constant.
C. PV=NRT: This is the ideal gas law, which combines Boyle’s, Charles’s, and Avogadro’s principles. While related, it is not the specific equation for Charles’s Law, as it includes additional variables like pressure, amount of gas, and the gas constant.
D. P1V1=P2V₂: This equation represents Boyle’s Law, describing the inverse relationship between pressure and volume at constant temperature. It does not address the direct relationship between volume and temperature described in Charles’s Law.
Correct Answer is A
Explanation
The bicarbonate buffering system in the blood helps maintain pH homeostasis by converting carbon dioxide into bicarbonate. When carbon dioxide (CO₂) dissolves in water, it forms carbonic acid (H₂CO₃), which can dissociate into hydrogen ions (H⁺) and bicarbonate ions (HCO₃⁻). This reversible reaction, catalyzed by the enzyme carbonic anhydrase, allows the blood to neutralize excess acids or bases. For example, when the blood becomes too acidic, bicarbonate binds H⁺ to form carbonic acid, which can be converted back into CO₂ and exhaled via the lungs. This system is the primary extracellular buffer, critical for stabilizing pH during metabolic and respiratory changes.
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