Despite its apparent durability, the dermis is subject to tearing. How might a person know that the dermis has been stretched and/or torn?
A) The pain is acute due to the large number of Meissner's corpuscles.
B) The appearance of visible, silvery-white scars is an indication of stretching of the dermis.
C) The blood vessels in the dermis rupture and the blood passes through the tissue, causing "black-and-blue marks."
D) The stretching causes the tension lines to disappear.
B) The appearance of visible, silvery-white scars is an indication of stretching of the dermis.
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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
The respiratory membrane is a combination of ________
A) respiratory bronchioles and alveolar ducts B) alveolar and capillary walls and their fused basement membranes C) respiratory bronchioles and alveolar sacs D) atria and alveolar sacs
The cytosol contains a high concentration of potassium ions, while the extracellular fluid usually contains a high concentration of ________ ions.
Fill in the blank(s) with the appropriate word(s).
What do the primary bronchi serve?
What will be an ideal response?