Which of the following is not a regulated process associated with the functioning of the respiratory system?
Transport of gases
Gas exchange in lungs and tissue
Control of cell metabolism rate
Pulmonary ventilation
The Correct Answer is C
A. Transport of gases: The respiratory system and blood regulate how O2 and CO2 are moved.
B. Gas exchange: This is a core respiratory function occurring at the alveolar and systemic levels.
C. Control of cell metabolism rate: This is primarily regulated by the endocrine system (specifically thyroid hormones) and the availability of nutrients.
D. Pulmonary ventilation: This is the act of breathing, which is heavily regulated by the brainstem to maintain pH and gas levels.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. prostate gland: The prostate secretes a slightly acidic, milky fluid that helps with sperm motility but does not provide the primary sugar source.
B. bulbourethral gland: Also known as Cowper glands, these secrete an alkaline mucus to neutralize urine acidity in the urethra.
C. seminal vesicle: These glands contribute about 60% of semen volume, including fructose to provide ATP energy for sperm "swimming."
D. Cowper gland: These secrete an alkaline mucus to neutralize urine acidity in the urethra.
Correct Answer is D
Explanation
A. two nerve fibers come in direct contact: In a chemical synapse, there is a physical gap called the synaptic cleft; the neurons do not touch.
B. impulses will pass in either direction: Chemical synapses are one-way streets because receptors are only located on the postsynaptic membrane.
C. an electrical spark will jump the gap: Nerve impulses are electrochemical, but they do not "spark" across the air/fluid gap like static electricity.
D. chemical transmitters are released: The arrival of an action potential triggers the release of neurotransmitters (like acetylcholine) to carry the signal across the cleft.
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