What are lipid rafts? What are their functions?
What will be an ideal response?
They are assemblies of saturated phospholipids associated with sphingolipids and cholesterol. They are concentrating platforms for molecules needed for cell signaling.
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What comprises a motor unit?
A. One neuromuscular junction B. The distance from one Z disc to the next C. One thick filament and all thin filaments with which it forms cross-bridges D. One nerve fiber and all the muscle fibers innervated by it E. One myofibril of a muscle fiber
The root of a tooth is covered by
A) enamel. B) cement. C) dentin. D) pulp. E) the root canal.
During starvation, ____________.
A) carbohydrate utilization increases. B) there is a decline in circulating ketone bodies. C) gluconeogenesis accelerates. D) structural proteins cannot be used as a potential energy source. E) All of these answers are correct.
The body surface region monitored by a specific pair of spinal nerves is called (a)
A) ramus communicans. B) dermatome. C) ventral ramus. D) perineurium. E) None of the answers are correct.