10. The animal care worker should be familiar with the dosages and handling of medications because he or she O A. is likely to maintain the practice's inventory. O B. may have to administer drugs for all animals that had surgery. O C. will be able to explain their effects to pet owners. O D. can then evaluate their effectiveness.

endo:

regulates body hormones, aldosterone, vasopressin

neural:

signal, regulates body using electric signals, reflex

endo has to do with hormones; aldosterone and vasopressin are both hormones. i also had this question and got it right : d

energy per photon is e = h*c / λ  

e = 6.63*10^-34 * 3*10^8 / 6*10^-7 j = 3.315*10^-19 j  

nr. of photons = 10j / 3.315*10 = ^-19 j per photon = 3.02*10^19 photons