All of the following would lead to an increase in the force generated by a muscle contraction except:
A. increasing the rate at which calcium is
pumped back into the sarcoplasmic reticulum.
B. increasing the frequency of muscle
stimulation by the motor nerve.
C. increasing the number of muscle fibers
activated.
D. increasing the number of motor units
activated.
E. maximizing the number of cross-bridges
formed during a contraction.
A
You might also like to view...
Sexual reproduction in the cellular slime mold Dictyostelium discoideum involves the production of special spores called
A. amoeba flagellates. B. sporozoites. C. discoidia. D. macrocysts.
Which of the following is a density-independent factor?
A) weather event B) food availability C) shelter availability D) availability of mates
Why do florists and horticulturists often cut stems while they're holding a plant underwater?
A) to avoid transpiration B) to prevent dormancy C) to disrupt apical dominance D) to avoid formation of an embolism
The restriction enzymes of bacteria protect the bacteria from successful attack by bacteriophages, whose genomes can be degraded by the restriction enzymes
The bacterial genomes are not vulnerable to these restriction enzymes because bacterial DNA is methylated. This situation selects for bacteriophages whose genomes are also methylated. As new strains of resistant bacteriophages become more prevalent, this in turn selects for bacteria whose genomes are not methylated and whose restriction enzymes instead degrade methylated DNA. The outcome of the conflict between bacteria and bacteriophage at any point in time results from _____. A) frequency-dependent selection B) evolutionary imbalance C) heterozygote advantage D) neutral variation