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Тесты

Вопрос 
1
On a specimen of vessel of the microcirculatory bed, the middle envelope is formed by 1-2 layers of smooth muscle cells, which are located alone and have a spiral direction. An external envelope is represented by a thin layer of loose connective tissue. Indicate the type of vessel.





2
On a histological specimen, it is observed a vessel, the wall of which consists of endothelium, basal membrane, subendothelium and loose connective tissue. Name the type of vessel?





3
In a specimen of a tubular organ, stained with orcein, it is seen about 50 thick membranes which have a wavy form and makes the base of the middle layer of this organ. Which organ is this?





4
Each of the following statements concerning cardiac muscle cells is true EXCEPT





5
In course of histidine catabolism a biogenic amin is formed that has powerful vasodilatating effect. Name it:





6
In the microspecimen of red bone marrow there were revealed multiple capillares through the walls of which mature blood cells penetrated. What type of capillares is it?





7
What is the normal pacemaker of the heart?





8
On autopsy of a still-born infant abnormalities have been revealed: ventricles are not separated, a single arterial trunk originates from the right part. For what class of vertebrates is such heart construction characteristic?





9
An artery of large caliber expands during a systolic stretch and returns to the original state during diastole, provides stability of blood stream. By the presence of what elements of the vessel wall can it be explained?





10
An organ of the circulatory system is presented on a microscopic specimen. One of its envelopes is built from fibers which anastomose one with another. These fibers are made up of cells which are united one with another with the intercalated disks. What the organ is it?





 
 
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