Which of the following is the most plentiful buffer in the tubular fluid of the kidney collecting duct?
a) Bicarbonate ion
b) Monohydrogen phosphate ion
c) Ammonium ion
d) Dihydrogen phosphate ion
e) None of these
b
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Describe the heart's location in the body
A) The heart is surrounded by the mediastinum in the anterior pericardium, deep to the sternum and superior to the diaphragm. B) The heart is surrounded by the pleural cavity in the anterior mediastinum, deep to the lungs and superior to the diaphragm. C) The heart is surrounded by the pleural cavity in the posterior mediastinum, deep to the sternum and inferior to the diaphragm. D) The heart is surrounded by the pericardium in the anterior mediastinum, deep to the sternum and superior to the diaphragm. E) The heart is surrounded by the pericardium in the posterior mediastinum, deep to the lungs and superior to the diaphragm.
The structures that cover the surfaces of bones where they meet one another are called ________.
Fill in the blank(s) with the appropriate word(s).
The velocity of blood flow through capillaries is
A. rapid, due to their small total cross sectional area. B. rapid, which prevents pooling in lower extremeties. C. slow, due to small total cross-sectional area, low friction and high pressure. D. slow, which allows sufficient time for exchange of gases and nutrients between blood and tissues.
Which of the following hormones does NOT influence blood pressure?
A. ADH B. epinephrine C. atrial natriuretic hormone D. aldosterone E. growth hormone