Which of the following common minerals is required to make the cross-bridge between myosin filaments and actin filaments during contraction of the sarcomere?

While on the job, medical assistants who have multiple facial piercings should ________

a. remove all jewelry b. conceal them while working c. assume the office should allow them to wear whatever jewelry they choose d. check what the office policy states in regard to piercings and jewelry

___________________ is the minimum temperature of a liquid in degrees Fahrenheit at which it emits vapors to form an ignitable mixture with air near the surface but will not sustain combustion

a. Flash point b. Fire point c. Heat of vaporization d. Heat of formation