Question 15 (1 point) Which of the following is true regarding the blood-testis barrier? A) It prevents blood from getting to the testes. B) It maintains testis temperature at 35°C. C) It prevents heat loss from the testes. D) It maintains testis temperature at 37°C. E) It prevents antibodies in the blood from getting to the germ cells. Question 16 (1 point) Theis the site of sperm maturation and storage. A) spermatic cord B) rete testis C) seminiferous tubules DOLL
Answer
The blood testis barrier: it prevents antibodies in the blood from getting to the germ cells. The walls of somniferous tubules are lined by sertoli cells and primitive germ cells. Tight functions between adjacent sertoli cells prevents large molecules from tissues from the adjoining lamina to tissues adjoining lumen. This barrier is called blood testes barrier. Its functions. Large molecules are prevented from passing from the interstitial tissue and the part of the tubule near the basal lamina to the tubular lumen. Antigenic substances are prevent set from entry into the circulation from developing germ cells. Antibodies from circulation if passes the barrier binds to various antigenic sites on sperm surface. Thus probability of fertilization of sperm is reduced. Steroids can penetrate the barrier. Epididymis is the site of sperm maturation & storage.
