The ________ is commonly known as the heel bone.
Fill in the blank(s) with the appropriate word(s).
calcaneus
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Which of the following muscles flexes the hip and extends the knee?
A) vastus medialis B) vastus lateralis C) rectus femoris D) biceps femoris
When observing a slide of the renal medulla, it an be seen that most of the medulla consists of
A. cross sections of proximal and distal convoluted tubules. B. longitudinal sections of nephron loops and collecting ducts. C. renal corpuscles. D. glomeruli. E. a mixture of all of these structures.
To initiate a smooth muscle cell contraction, calcium enters the cell and binds to
A. troponin, which then activates myosin light-chain kinase. B. calmodulin, which then binds to and activates myosin light-chain kinase. C. myosin light-chain kinase, which then hydrolyzes ATP. D. a phosphatase, which then removes the tropomyosin blockade. E. a myosin head, which then activates calmodulin.
Unlike erythrocytes, leukocytes contain a nucleus and the usual complement of organelles, including mitochondria
Indicate whether the statement is true or false