The hypoxia associated with high altitude can cause
A) vasodilation of the major venous blood vessels.
B) vasodilation of the major arterial blood vessels.
C) vasoconstriction of the pulmonary blood vessels.
D) vasoconstriction of the coronary blood vessels.
C
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Following strenuous exercise, blood levels of lactic acid are ________ compared to pre-exercise levels. This change in acid concentration causes a reflex ________ in ventilation by activating ________.
A. increased; increase; central chemoreceptors B. increased; increase; peripheral chemoreceptors C. decreased; decrease; peripheral chemoreceptors D. decreased; decrease; central chemoreceptors E. increased; increase; baroreceptors in the aortic arch
Parallel curving ridges of dermis that shape the overlying epidermis into fingerprints
A. improve the grip of the hands. B. are caused by the pattern of the reticular layer of the dermis. C. are associated with thin skin. D. decrease friction on surfaces where they are located. E. tend to make the surface smooth.
How are endocrine and exocrine glands different from each other?
A. Exocrine glands are only unicellular in structure. B. Endocrine glands have no ducts. C. Exocrine glands have specific target organs for their secretions. D. Exocrine glands secrete hormones.
Define acute
What will be an ideal response?