Multiple choice more then one correct answer

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The maternal part of the placenta consists of: a/ cotyledones b/ loose connective tissue slips (septae) c/ blood lacunae d/ amnion e/ chorionic plate

A b c

The somites (epimer of the mesoblast) form: a/ dermatomes b/ sklerotomes c/ myotomes d/ nephrotomes e/ hypomer

A b c

The fetal sack wall consists of: a/ amnion b/ smooth chorion (chorion laeve) c/ placental villae d/ covering decidua (decidua capsularis) e/ basal decidua (deciduas basalis)

A b d

Which of the following are specific for the acrosomal reaction: a/ releasing of the acrosomal enzymes b/ facilitates the penetration of spermatozoon through zona pellucida of the oocyte c/ type of endocytosis d/ completed after the spermatozoon receptor binding to zona pellucida e/ completed after the fertilization

A b d

From the ectoblast derivates: a/nervous tissue b/ blood tissue c/ skin epithelium (epidermis) d/ epithelium of the oral cavity e/smooth muscle tissue

A c d

The placental barrier after the third month of embryogenesis consists of: a/ syncytial trophoblast b/ cytotrophoblast c/ epithelium of the placental capillaries d/ mesenchyme of the placental villa e/ epithelium of the uterus capillaries

A c d

The fetal part of the placenta consists of: a/ loose connective tissue slips (septac) b/ blood lacunae c/ chorion frondosum d/ amnion e/ cotyledones

B and d

From the mesenchyme derivates: a/cardiac muscle tissue b/ smooth muscle tissue c/ skeletal muscle tissue d/ blood tissue e/microglia

B d e

Which of the following is typical for monozygotic twins: A/ they dont look alike b/ they look alike c/ they can be of a different gender d/ they are always the same gender e/ there are no differences in their immunological characteristics

B d e

Which of the following are specific for the cortical reaction is: a/ completed in corona radiata b/ associated with releasing of the acrosomal enzymes c/ associated with releasing of the proteolytic enzymes under the oocyte plasmalemma d/ associated with destroying of the spermatozoon receptors in zona pellucida e/ blocks the passing of more than one spermatozoon into the oocyte

C d e


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