Oxygen plays a minor role in the control of normal respiration because
A) deoxygenated venous blood is 75% saturated.
B) oxygenated blood is < 95% saturated.
C) deoxygenated venous blood is < 5% saturated.
D) oxygenated blood is more sensitive to CO2.
A
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Which division functions to conserve energy and replenish the supply of nutrients?
A. Parasympathetic B. Somatic C. Sympathetic
Produces antibodies that neutralize foreign substances.
A) Lymphatic B) Cardiovascular C) Immune D) Endocrine
The parasympathetic fibers that are involved in control of the eye are from the
A) trigeminal nerve. B) facial nerve. C) vagus nerve. D) glossopharyngeal nerve. E) oculomotor nerve.
Which of the following factors does not directly affect breathing rate?
A) Partial pressure of oxygen in body fluids. B) Degree of lung tissue stretch C) pH D) Partial pressure of carbon dioxide in body fluids.