单选题
题目：The number of chromosomes of gametes is halved during the
A、 mitotic division
B、 fertilization
C、 first meiosis
D、 spermiogenesis
E、 second meiosis
单选题
题目：Until the end of the fourth week, intraembryonic mesoderm is actively formed from the
A、 extraembryonic mesoderm
B、 primitive streak
C、 endodermal cells
D、 notochord
E、 trophoblast
单选题
题目：How many follicles usually grow up to full maturity in each menstrual cycle?
A、 3 - 5
B、 Only one
C、 5 - 10
D、 15 - 20
E、 10 - 15
单选题
题目：The energy for sperm movement comes from
A、 the sheath of mitochondria
B、 the nucleus
C、 the acrosome
D、 the residual body
E、 the microtubule axoneme
单选题
题目：Completion of the second meiosis of the oocyte occurs during the
A、 secretory phase of the menstrual cycle
B、 proliferative phase of the menstrual cycle
C、 fertilization
D、 cleavage
E、 ovulation
单选题
题目：The proliferative phase of menstruation is related to
A、 high level of progesterone
B、 ovulation
C、 development of follicles and secretion of estrogen
D、 degeneration of the corpus luteum
E、 development of the corpus luteum
单选题
题目：Which of the following cells divide by second meiotic division?
A、 Sertoli cells
B、 Primary spermatocytes
C、 Spermatogonia
D、 Secondary spermatocytes
E、 Spermatids
单选题
题目：Which of the following is NOT a function of the respiratory system?
A、 Taking in oxygen
B、 Conversion of AT1 to AT2
C、 Perceiving sensation of taste
D、 Taking out carbon dioxide
E、 Making voice
2024-12-27
共50道
