Embryo 6

Bone morphogenetic proteins (BMPs) are involved mainly in:

• Ventralisation of the mesoderm

• Formation of the adrenal gland parenchyma

• Transformation of secondary villus to tertiary villus

• Formation of anterior visceral endoderm

• Establishing uteroplacental circulation

The secretory phase of the menstrual cycle is mainly under influence of:

• Aldosterone

• Epinephrine

• Progesterone

• Estrogen

• None of the above

Pituicytes are:

• Hormone secreting cells

• Kind of glial cells

• Free axons

• Cancer cells derived from hypophysis

• Prolactin secreting cells

During the first month of pregnancy, placental barrier is formed by:

• Syncytiotrophoblast, cytotrophoblast, extraembryonic mesoderm, endothelium

• Syncytiotrophoblast, cytotrophoblast, intraembryonic mesoderm, endothelium

• Syncytiotrophoblast, cytotrophoblast, endothelium

• Syncytiotrophoblast, endothelium

• Cytotrophoblast, endothelium

The length of normal pregnancy is considered to be:

• 42 weeks after onset of last normal menstrual period

• 40 weeks after onset of last normal menstrual period

• 38 weeks after onset of last normal menstrual period

• 36 weeks after onset of last normal menstrual period

• 34 weeks after onset of last normal menstrual period

Hypoblast and epiblast layers derive from:

• Syncytiotrophoblast

• Cytotrophoblast

• Trophoblast

• Inner cells mass

• Outer cell mass

Which structure does not cover testis?

• Tunica vaginalis

• Tunica albuginea

• Tunica vasculosa

• Capsule of dense, irregular connective tissue

• Germinal epithelium

Brain vesicles are dilations of:

• Neural groove

• Neural folds

• Posterior neurophore

• Caudal portion of the neural tube

• Cephalic portion of the neural tube

Parathyroid hormone:

• Decreases blood calcium levels

• Inhibits calcium resorption in the uriniferous tubules

• Is released by parafollicular cells (calcitonin)

• Is secreted and synthesized by chief cells

• Release is stimulated by an increase in serum calcium levels

Rathke’s pouch is a precursor of:

• Thyroid

• Parathyroid

• Thymus

• Adenohypophysis

• Corpus pineale