Polar molecules have trouble passing through the nonpolar part of the phospholipid bilayer. Ions require ion channels and is not as easy as those that simply just diffuse through the membrane. Ion channels might require energy, too... Not glucose because those are larger molecules.
Overtime is the amount of time someone works beyond normal working hours. Normal hours may be determined in several ways: 1  by custom (what is considered healthy or reasonable by society), 2  by practices of a given trade or profession, 3  by legislation,hus, an employee might work 48 hours in one week, and 32 hours the next week (assuming over 40 hours is overtime), and be paid an extra amount equivalent to 4 hours work (8 multiplied by 0.5).
time off in lieu noun [U]. âº âtime that an âemployee who has âworked âextra âhours may take off from âwork: Where âeligible âmembers of âstaff have âworked âagreed âadditional âhours above âtheir ânormal âworking âweek, the University âoffers âtime off in âlieu.time off in lieuâ: synonyms and related words: 1  absentee. 2  Boxing Day. 3  break. 4  career break. 5  comp time. 6  compassionate leave. 7  holiday. 8  hols. 9  legal holiday. 10  parental leave. 11  paternity leave. 12  public holiday. 13  R and R. 14  recess. 15  sickie. 16  skive. 17  take sth off. 18  tea break. 19  toil. 20  weekend.