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WorksheetsEmbryo 3
Total questions: 12
Worksheet time: 9mins
1. Placenta develops from
(a) Decidua capsularis and chorion
(b) Decidua capsularis and amnion
(c) Decidua basalis and chorion
(d) Decidua parietalis and trophoblast
2. Placental membrane in later stages of pregnancy mainly consists of
(a) Cytotrophoblast and syncytiotrophoblast
(b) Syncytiotrophoblast and fetal endothelium
(c) Mesoderm and fetal endothelium
(d) Syncytiotrophoblast only
3. All are main functions of placenta except
(a) Transport of nutrients
(b) Excretion of waste products
(c) Growth of embryo and fetus
(d) Exchange of gases O2 and CO2
4. Normal amount of amniotic fluid at full term is
(a) 250 ml
(b) 500 ml
(c) 1000 ml
(d) 200 ml
5. Type of human placenta is
(a) Epitheliochorial
(b) Hemochorial
(c) Endotheliochorial
(d) Endothelioendothelial
6. Skin develops from
(a) Mesoderm and endoderm
(b) Ectoderm and mesoderm
(c) Ectoderm and endoderm
(d) Surface ectoderm and neuroectoderm
7. Dendritic cells (melanoblasts) of skin are derived from
(a) Ectoderm
(b) Bone marrow
(c) Endoderm
(d) Neural crest
8. All develops from ectoderm except
(a) Sweat glands
(b) Dermis
(c) Nail
(d) Hair
9. Incorrect statement about melanocytes of the skin
(a) They develop from neural crest cells
(b) They produce increased amount of melanin in response to ultraviolet light
(c) In white races their cell bodies are usually confined to basal layers
(d) They begin producing melanin after birth
10. Limb muscles develop from
(a) Paraxial mesoderm
(b) Lateral plate mesoderm
(c) Splanchnic mesoderm
(d) Neural crest cells
11. Select the incorrect statement
(a) Most of the muscles of head and neck region are derived from somatomeres
(b) Cardiac muscle and most of the smooth muscles are derived from splanchnic mesoderm
(c) Extraocular muscles develop from preotic myotome
(d) Muscles of iris develop from surface ectoderm
12. Preotic myotomes are arranged around
(a) Otic capsule
(b) Optic vesicle
(c) Nasal capsule
(d) None of the above
