Blog

40. The corpus luteum prevents loss of the implanted embryo through menstruation by secreting ________.        

31. Implantation begins six to seven days after ovulation.

46. Intercalated discs contain anchoring desmosomes that prevent cell separation, and gap junctions that allow ions to travel from cell to cell enabling greater communication by increasing the surface area, transmitting current across the entire heart. The fibrous cardiac skeleton acts as a tendon, an insertion and insulator, giving the cardiac cells something to pull or exert their force on and isolating atrial from ventricular contractions

15. Fertilization generally occurs in the ________.        

49. A urine test reveals a positive result for human chorionic gonadotropin (hCG). This indicates ________ was successful.        

44. The correct sequence of preembryonic structures is ________.        

11. The ability of sperm cells to move along the ductus deferens is due to ________.        

11. Possible causes of hypoxia include ________.        

14. The structures that receive the ovulated oocyte, providing a site for fertilization, are called the ________.          

19. Secretion of progesterone stimulates ________.