What is the layer labeled "4"?
Muscularis externa
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Urea is
A) actively transported into the filtrate by the cells of the collecting duct. B) completely eliminated in the urine. C) passively reabsorbed in the proximal tubule. D) actively secreted in the distal tubule. E) actively reabsorbed in the proximal tubule.
What would the following blood values indicate? Blood pH = 7.3, [HCO3-] is high, PCO2 is high.
A) metabolic acidosis with respiratory compensation B) respiratory alkalosis with renal compensation C) respiratory acidosis with renal compensation D) metabolic alkalosis with respiratory compensation E) metabolic acidosis only
The oropharynx is lined with which type of epithelium?
a. stratified squamous b. simple columnar c. pseudostratified d. simple squamous
The constant region of the five classes of immunoglobulins are the same, and their names depend on their variable regions.
Answer the following statement true (T) or false (F)