Question

Page 5 28) Initially, the nutrients absorbed by the mass by simple A) osmosis. B) diffusion. C) peristalsis. D) ciliary action. E) convection. trophoblast easily reach the Inner cell 29) The placenta is a source of which of the following hormones? A) h20 The placeata i B) relaxin C) placental lactogen D) progesterone E) All of the answers are correct 30) Which of the following is a critical event of the first trimester? A) cleavage B) implantation C) placentation D) embryogenesis E) All of the answers are correct. 31) During gastrulation, A) the blastomeres fuse. B) the placenta penetrates the endometrium C) three germ layers are formed. D) cells from the hypoblast move to the epiblast E) the neural tube closes 32) Oxygenated blood from the placenta returns to the fetus in the A) allantois. B) umbilical vein. C) umbilical arteries. D) decidua capsularis. E) umbilical capillaries. 33) The part of the endometrium that covers the implanted embryo and lacks chorionic villi is the: A) decidua parietalis. B) decidua albicans. C) decidua functionalis. D) decidua capsularis. E) decidua basalis. 34) Which embryonic germ layer forms the linings of the respiratory and digestiv tracts? A) mesoderm B) ectoderm C) trophoderm D) endoderm E) epiderm

Answer 1

28.simple diffision

29.All of these

30.All of these

31.three germ layers are formed

32.umbilical vein

33.decidua capsularis

34.endoderm