Thin filaments at either end of the sarcomere are attached to the
A) Z line.
B) M line.
C) H band.
D) A band.
E) I band
A) Z line.
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You have designed a drug that is supposed to bind to the myosin binding sites on actin. You inject it into a relaxed muscle, but find that none of the drug bound. Which of the following explains why?
A. Troponin molecules are covering myosin binding sites on actin. B. The myosin binding sites on actin are covered by tropomyosin. C. The myosin binding sites are covered by ATP. D. There are no myosin binding sites on actin. E. None of the choices are correct.
A stimulus applied to the surface of the cerebellar cortex activates a beam of parallel fibers. This produces:
A. a wave of inhibited Purkinje cells in line with the parallel fiber beam B. waves of excited Purkinje cells that flank the parallel fiber beam C. a wave of excited basket and stellate cells in line with the parallel fiber beam D. waves of excited basket and stellate cells that flank the parallel fiber beam E. complex spikes in Purkinje cells in line with the parallel fiber beam
Which of the following is a common function of RNA?
a) produce electrical impulses b) storage of energy c) transfer information for protein synthesis d) long-term storage of information for protein synthesis e) transport of fluids
Inadequate circulation of blood and nutrients to the tissue is known as:
a. Autolysis b. Hypoperfusion c. Necrosis d. Phagocytosis