TLS Online TPP Program

#Question id: 15301


Initially, the morula does not have an internal cavity. However, during a process, cavitation, the trophoblast cells secrete fluid into the morula to create a blastocoel, these 
membranes of trophoblast cells contain_______?

#Unit 5. Developmental Biology
  1. an Na+-H+ exchanger that pump Na+ into the central cavity
  2. an Na+-K+ ATPase that pump Na+ into the central cavity
  3. an Na+/Ca 2+ exchanger that pump Na+ into the central cavity
  4. a and b both