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.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. heart: The heart consists primarily of cardiac muscle tissue and is responsible for pumping blood, not producing it.
B. lungs: The lungs are the site of gas exchange between the air and the blood.
C. bones: Red bone marrow is hematopoietic tissue, meaning it is the primary site for the formation of all blood cells (red, white, and platelets).
D. intestines: The intestines are involved in the digestion and absorption of nutrients into the bloodstream.
Correct Answer is {"dropdown-group-1":"B"}
Explanation
A. positive: The outside of the neuron is more positive due to a higher concentration of sodium ions (Na+).
B. negative: During the resting membrane potential, the inside of the neuron is negatively charged (typically -70mV) relative to the outside, largely due to internal proteins and the leakage of potassium.
C. equal: If the charge were equal, there would be no membrane potential, and the neuron could not fire an impulse.
D. None of the above: Incorrect, as choice B is the standard physiological fact.
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