Factors affecting the release of oxygen from hemoglobin can be visualized by using a
A) spirograph.
B) pulmonary volume chart.
C) respiratory cycle chart.
D) oxygen-hemoglobin saturation curve.
E) blood gas analysis.
D
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A reduction in the secretion of ____ may serve as the trigger for the onset of puberty
a. inhibin b. melatonin c. adrenal androgens d. gonadotropin-releasing hormone e. pituitary gonadotropic hormones
Cerebrospinal fluid of the central nervous system and synovial fluid of joint capsules are both examples of
A. extracellular fluid. B. intracellular fluid.
The color of urine is determined mainly by __________ .
a) diet b) filtration rate c) byproducts of red blood cell breakdown d) filtration efficiency
Which is TRUE about the muscle fibers found in a muscle spindle?
A. They are not true muscle fibers because they cannot contract. B. They are innervated by alpha motor neurons. C. They function to maintain tension on spindle receptors. D. When stimulated to fire, they always inhibit flexor muscles. E. Their contraction is stimulated by alpha motor neurons and inhibited by gamma motor neurons.