If the thoracic duct were tied off, which of the following classes of nutrients would not enter the circulatory system at their normal rate?
A. Lipids
B. Disaccharides
C. Glucose
D. Amino acids
E. Monosaccharides
Answer: A
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Permitting the exchange of nutrients and gases between the blood and tissue cells is the primary function of ________.
A) arterioles B) arteries C) veins D) capillaries
This part of the peripheral nervous system controls smooth muscle, cardiac muscle, and glands
A) spinal cord B) sensory division C) somatic division D) autonomic nervous system
Define depolarization, and describe the events that follow it
A) Depolarization is the when the inside of the cell becomes negative due to sodium ions rushing out. After depolarization, repolarization occurs when potassium ions rush into the cell causing the inside of the cell to become positive again. B) Depolarization is the when the inside of the cell becomes positive due to sodium ions rushing in. After depolarization, repolarization occurs when potassium ions rush out of the cell causing the inside of the cell to become negative again. C) Depolarization is the when the inside of the cell becomes negative due to potassium ions rushing out. After depolarization, repolarization occurs when sodium ions rush into the cell causing the inside of the cell to become positive again. D) Depolarization is the when the inside of the cell becomes positive due to potassium ions rushing in. After depolarization, repolarization occurs when sodium ions rush out of the cell causing the inside of the cell to become negative again. E) Depolarization is when the inside of the cell becomes neutral due to an equal amount of sodium ions entering the cell and potassium ions leaving the cell.
About 70% of the CO2 that diffuses into systemic capillaries
A. binds to hemoglobin. B. forms carbonic anhydrase, which combines carbonic acid and water to solubilize the CO2. C. combines with water to form carbonic acid, which then dissociates into bicarbonate and hydrogen ions. D. directly dissolves in the plasma.