HD 201 E1 Samplex 2009 Flashcards
Group of cells in the embryonic disc or embryoblast that is related to the amniotic cavity
A. Epiblast
B. Hypoblast
C. Mesoblast
D. Endoblast
A
Forms the roof of the primary yolk sac
A. Epiblast
B. Hypoblast
C. Mesoblast
D. Endoblast
B
Structure/s that comprise or form the chorion
A. Extraembryonic mesoderm
B. The two layers of the trophoblast
C. Syncitiotrophoblast layer only
D. A and B
D
Thickened area in the hypoblast that indicates the future cranial region of the embryo
A. Prechordal plate
B. Cloacal membrane
C. Primitive pit
D. Primitive groove
A
Site of origin of the oogonia
A. Amniotic cavity
B. Chorionic cavity
C. Yolk Sac
D. Intraembryonic coelom
C
- The embryonic endoderm gives rise to the following EXCEPT
A. Blood vessels associated with tissues and organs
B. Epithelial linings of the respiratory passages
C. Gastrointestinal tract
D. Glandular cells of the liver and pancreas
A
Future site of the anus
A. Prechordal plate
B. Oropharyngeal membrane
C. Cloacal membrane
D. Primitive pit
C
Induction of the neural plate formation is dependent on
A. Development of the primitive streak
B. Formation of the secondary yolk sac
C. Formation of the notochord
D. Development of the three germ layers
C
True of neural tube defects EXCEPT
A. One of the most common congenital anomalies
B. Persistence of the primitive streak
C. Results from disturbances of neurulation
D. Neural folds fail to fuse
B
Contributes to the formation of the face and neck
A. Pharyngeal arch
B. Auricular Hillock
C. Mesonephric ridge
D. Somites
A
True of the chorionic villi
A. It is the chorion laeve that contributes to the formation of the placenta
B. Chorionic villi cover the entire chorionic sac up to the eight week of life
C. The chorionic villi associated with the deciduas basalis degenerate and disappear
D. Secondary chorionic villi consists of a core of cytotrophoblast surrounded by syncitiotrophoblast
D
Hormone secreted by the synictiotrophoblast that serves as a basis for pregnancy tests
A. Progesterone
B. Estrogen
C. Lactogen
D. Human chorionic gonadotrophin
B
Endometrial tissue accumulate glycogen and lipid in their cytoplasm in response to implantation and increasing progesterone content
A. Luteinization
B. Spermiation
C. Decidualization
D. Ovulation
C
Intervillous space containing maternal blood is derived from the following structure
A. Lacuna in syncytiotrophoblast
B. Lacuna developing in cytotrophoblast
C. Eroded maternal blood vessels
D. Eroded deciduas basalis
A
Structure that disappear over large areas of the placental villi with increasing age of the placenta
A. Syncitiotrophoblast
B. Cytotrophoblast
C. Connective tissue of villi
D. Endothelium of fetal capillaries
B
Characteristic of the maternal surface of the placenta
A. Cobblestone appearance of the maternal surface
B. This is where the umbilical cord is attached
C. Chorionic vessels from the umbilical vessels are clearly visible
D. Covered with shiny amniotic membrane
A
Superficial part of the deciduas overlying the conceptus
A. Deciduas basalis
B. Deciduas parietalis
C. Deciduas capsularis
D. All of the above
C
Components of the placenta
A. Chorion frondosum B. Decidua basalis C. Chorion laeve D. A and B E. B and C
D
Chorionic villi that lacks connective tissue and fetal blood vessels
A. Primary villi
B. Secondary villi
C. Tertiary villi
D. Stem villi
A
True of the placenta EXCEPT
A. Umbilical vein in the cord carries oxygen poor blood
B. Placental septa divides placenta into irregular convex areas called cotyledons
C. Placenta is thickest at its center and diminishes in thickness towards the periphery
D. Fetal surface is smooth shiny and transparent
A
The acellular glycoprotein layer surrounding the primary oocyte
A. Corona radiata
B. Zona pellucida
C. Zona compacta
D. Zona basalis
B
Causes completion of meiosis I
A. Fertilization
B. Cortical reaction
C. Acrosome reaction
D. Ovulation
D
Causes completion of meiosis II
A. Fertilization
B. Cortical reaction
C. Acrosome reaction
D. Ovulation
A
The lining epithelium of the fallopian tube
A. Simple squamous ciliated
B. Simple cuboidal ciliated
C. Simple columnar ciliated
D. Pseudostratified columnar ciliated
C
The secretory stage of the menstrual cycle is characterized by which of the following
A. Glands become tortuous
B. Rapid regeration of the endometrium
C. Coiled arteries appear only at the base of the endometrium
D. Endometrium hypertrophies owing to cellular proliferation of gland cells
A
Which layer of the uterus is shed off during menstruation
A. Parametrium
B. Stratum functionalis
C. Myometrium
D. Stratum basalis
B
Which is not found in the Graafian follicle
A. Corona radiata
B. Granulosa layer
C. Theca interna
D. Germinal epithelium
D
Which stage of ovarian follicle development do you expect to see for the first time the theca folliculi
A. Primordial
B. Primary
C. Secondary
D. Graafian
B
Which structure in the ovary is essential for the endometrium to undergo its secretory phase
A. Corpus luteum
B. Corpus albicans
C. Theca folliculi
D. Ovarian follicle
A
During ovulation what happens to the oocyte
A. Starts cleavage
B. Completion of meiosis 1 and 2
C. Becomes impenetrable to sperm
D. Becomes a secondary oocyte
D
Endocrine component of the testis
A. Sertoli cell
B. Leydig cell
C. Spermatogonia
D. Spermatocyte
B
Rete testis are found in the connective tissue of
A. Mediastinum testis
B. Septula testis
C. Lobuli testis
D. Tunica albuginea
A
Inclusion peculiar to the human Sertoli cell
A. Crystal of Reinke
B. Crystal of ferritin
C. Crystal of Charcot-Bottcher
D. Crystal of guanine
C
Longest stage in meiosis of the primary spermatocyte
A. Prophase
B. Metaphase
C. Telophase
D. Anaphase
A
True of male germ cell differentiation
A. Daughter cells in spermatogenesis are completely separated from each other after each cell division
B. Spermatocytogenesis refers to the changes spermatids undergo to transform into mature sperms
C. Sertoli cells do not participate in movement of the differentiating germ cells
D. In meiosis, the spermatocyte undergo two divisions that reduce chromosome number in half
D
Initiates the formation of the axoneme in the sperm flagellum
A. Appearance of the acrosomal granule
B. Migration of centriole in posterior pole of the nucleus
C. Condensation of the nucleoplasm
D. Movement of cytoplasm to the posterior pole of the nucleus
B
The secondary spermatocytes are seldom seen in histologic preparations because
A. They are very small
B. Are lost in the sertoli cell
C. Immediately divide to become spermatids
D. Are seldom formed from primary spermatocytes
C
Which is lined with alternating groups of tall and low cells resulting in its irregular lumenal outline
A. Rete testis
B. Ductus epididymis
C. Tubuli recti
D. Ductuli efferentes
D
The walls of the vas deferens is thick primarily because it has a very prominent
A. Mucosa
B. Serosa
C. Adventitial
D. Muscle layer
D
Which segment of the tail of the spermatozoon has a mitochondrial sheath
A. End piece
B. Neck piece
C. Middle piece
D. Principal piece
C