Which of the following are functions of articular cartilage?
A. minimize friction and wear at a joint
B. protect against joint dislocation
C. both A and B
D. neither A nor B
C. both A and B
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In the peripheral nervous system, Schwann cells participate in the repair of damaged nerves by
A) producing new axons. B) regenerating cell bodies for the neurons. C) forming a cellular cord that directs axonal regrowth. D) clearing away cellular debris. E) producing more satellite cells that fuse to form new axons.
Which is NOT a transport mechanism typically seen in renal tubular epithelial cells?
A. cotransport proteins in the luminal membrane of the proximal tubule that move Na+ and glucose from the proximal tubule into epithelial cells B. transport proteins that move glucose by facilitated diffusion from inside of proximal tubule cells into the renal interstitial fluid C. ion channels that allow Na+ to move by diffusion from the lumen of the proximal tubule into epithelial cells D. Na+-K+ ATPase pumps in the luminal membrane of proximal tubule epithelial cells that move Na+ from inside the cell into the tubule and K+ from the tubule lumen into the cell E. countertransport proteins that move Na+ into proximal tubule epithelial cells while moving H+ from the cells into the lumen
All of the following are posterior leg muscles except the
A. popliteus. B. gastrocnemius. C. extensor digitorum longus. D. soleus. E. All of these are posterior leg muscles.
The capacity of a muscle to respond to an electrical stimulus is ______.
a. elasticity
b. contractility
c. excitability
d. extensibility