Which of the following would cause a decrease in the binding affinity of hemoglobin for oxygen?
A. increased pH of the blood
B. increased temperature of the blood
C. decreased DPG levels in erythrocytes
D. the presence of carbon monoxide
E. decreased concentration of H+ in the blood
B
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Most acidic substances (hydrogen ions) originate as by-products of cellular metabolism
Indicate whether the statement is true or false
Match the transport process to its description.
1. the movement of molecules from an area of high concentration to an area of low concentration 2. the movement of molecules via proteins embedded in the cell membrane; requires ATP 3. the movement of molecules against the concentration gradient 4. tends to create an equilibrium state A. active transport B. passive transport
Which of the following are nerves of the posterior division of the brachial plexus?
A) axillary nerve B) radial nerve C) musculocutaneous nerve D) ulnar nerve E) both radial and axillary nerves
Which of the following statements about the resting membrane potential is TRUE?
A) It results, in part, from the concentration gradients for Na+ and K+. B) It is due in part to the presence of extracellular proteins. C) It is normally equal to zero volts. D) The inside of the membrane is positively charged compared to the outside.