Explain why inulin is an ideal choice to measure renal clearance and the glomerular filtration rate (GFR)
What will be an ideal response?
Inulin, a plant polysaccharide, is filtered by the kidneys but it is neither reabsorbed nor secreted by the renal tubule or collecting system. For a substance to provide an accurate view of the glomerular filtration rate (GFR), the substance should be completely filtered yet neither reabsorbed nor secreted. If a substance is secreted by the renal tubules, the substance will show a greater renal clearance than GFR whereas substances that are reabsorbed will show a lower renal clearance than GFR.
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Which layer of the heart wall consists of cardiac muscle tissue?
a) Epicardium b) Pericardium c) Myocardium d) Endocardium e) Hypocardium
The last part of the renal tubule is the
A) proximal convoluted tubule. B) nephron loop. C) glomerulus. D) glomerular capsule. E) distal convoluted tubule.
Tears are secreted by?
A) ?conjunctiva. B) ?lacrimal glands. C) ?sclera. D) ?choroid.
Which of the following is associated with the "flight-or-fight" reaction?
A. Reduced urinary output B. Increased gastric motility C. Glycogen synthesis D. Reduced heart rate E. Pupillary constriction