Embryology exam 1

Embryology exam 1.....................4. What is the cavity within a secondary follicle? a. Graffian follicle b. Theca folliculi c. Granulosa cells d. Zona pellucida e. Antrum 5- What is the main hormone which stimulates the growth of the follicles and the production of estrogen by the follicular cells? a. FSH b. LH c. HCG d. Estrogen e. Progesterone 6- What is the female organ called where gametogenesis occurs? a. Oogenesis b. Ovary c. Ovulation d. Oocyte 7- Which stage of the follicle is marked by the surrounding follicular epithelial cells that become cuboidal in shape and then columnar? a. Primordial follicle b. Primary follicle c. Secondary follicle d. Mature follicle e. Graffian follicle 8- What is ovulated? a. Primary oocyte b. Secondary oocyte c. Oogonia d. All of them e. None of them 9- What is the thin internal layer of the uterus wall? a. Endometrium b. Myometrium c. Perimetrium d. Fundus 10- Which is the hormone that maintains the corpus luteum during pregnancy? a. FSH b. LH c. HCG d. Estrogen e. Progesterone 11- Which structure contains the oocyte? a. Ovarian Follicle b. Germinal epithelium c. Medulla d. Tunica albuginea e. Cortex 12- When the primary oocyte is pushed to one side of the follicle, it is surrounded by a mount of follicular cells that projects into the antrum. What are they called? a. Granulosa layer b. Zona pellucida c. Theca folliculi d. Cumulus oophorus 13- All these statements are true except for? a-The amniotic cavity appears as a space between the cytotrophoblast and embryoblast. b- The embryoblast differentiates into a bilaminar embryonic disc: epiblast, and hypoblast. c- The prechordal plate develops as a localized thickening of the epiblast. d-The prechordal plate indicates the future cranial region of the embryo and the future site of the mouth. e-The prechordal plate is also an important organizer of the head region. 14- What is the glycoprotein coat which surrounds the oocyte? a. Graffian follicle b. Theca folliculi c. Granulosa cells d. Zona pellucida e. Antrum 15- All these statements are true except for? a- Following the two meiotic divisions, the diploid number of chromosomes, 46, is reduced to the haploid number, 23. b- Four sperms form from one primary spermatocyte, whereas only one mature oocyte results from maturation of a primary oocyte. c- The cytoplasm is conserved during oogenesis to form one large cell, the mature oocyte. d- The polar bodies are small functional cells. 16- What is it called when the oocyte contains the two haploid pronuclei? a. Ootid b. Ovary c. Zygote d. Oocyte 17- Which stage of the follicle is characterized by a surrounding of flattened (squamous) follicular cells? a. Primordial follicle b. Primary follicle c. Secondary follicle d. Mature follicle e. Graffian follicle 18- What is another term for the mature follicle? a. Primordial follicle b. Primary follicle c. Graffian follicle 19- What occurs cyclically in a female? a. Oogenesis b. Ovary c. Ovulation d. Oocyte 20- What is the connective tissue layer around the primary follicle? a. Graffian follicle b. Theca folliculi c. Granulosa cells d. Zona pellucida e. Antrum 21- Which hormone serves as the trigger of ovulation? a. FSH b. LH c. HCG d. Estrogen e. Progesterone 22- What is it called when the pronuclei fuse into a single diploid aggregation of chromosomes? a. Ootid b. Ovary c. Zygote d. Oocyte 23- What is the correct term for the production of female gametes? a. Oogenesis b. Ovary c. Ovulation d. Oocyte 24- What are the follicular cells? a. Graffian follicle b. Theca folliculi c. Granulosa cells d. Zona pellucida e. Antrum 25- Which of the following are the earliest cells of spermatogenesis? a. Primary spermatocytes b. Secondary spermatocytes c. Spermatids d. Spermatozoa e. Spermatogonia ....................