Which is not a correct pairing of a bone and its common name?
A. Tibia - shin
B. Talus - heel
C. Scapula - shoulder blade
D. Patella - knee cap
E. Clavicle - collar bone
Answer: B
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An increase in parasympathetic activity ____________________ the rate of depolarization of the SA node
Fill in the blank(s) with correct word
The percentage of volume of red blood cells is called the _______________
Fill in the blank with correct word.
At the renal plasma threshold
A) the urine has too little glucose. B) blood volume is so great that nephrons cannot keep up. C) more glucose is in the blood, limiting the amount of glucose that can be reabsorbed. D) more glucose is in the filtrate than active transport can handle.
Myasthenia gravis results from the destruction of acetylcholine receptors at the neuromuscular junction, but treatment involves medications that reduce acetylcholinesterase activity. Which statement best explains the effectiveness of these medications?
A. The antibodies destroy some but not all of the acetylcholine receptors, so reducing acetylcholinesterase activity increases the likelihood that acetylcholine will bind to the remaining receptors. B. The antibodies that destroy the acetylcholine receptors are less likely to work if acetylcholinesterase is present. C. Acetylcholinesterase is the substance that destroys the receptors as well, so reducing its activity increases the number of acetylcholine receptors. D. Acetylcholinesterase breaks down the acetylcholine to a substance that can bind to the damaged receptors.